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testo 440 dP - Air velocity and IAQ measuring instrument including differential pressure sensor
0560 4402
testo 440 dP - Air velocity and IAQ measuring instrument including differential pressure sensor
0560 4402Built-in differential pressure sensor – enables Pitot tube and filter measurements without additional equipment
Wireless flexibility – using Bluetooth® probes for hassle-free measurements up to 20 m away.
Intuitive operation – with structured menus for volume flow, comfort level, and long-term monitoring.
Versatile probe compatibility – with simultaneous support for Bluetooth, cable, and thermocouple probes
USB data export – for easy reporting and analysis of up to 7500 stored measurements.
Precise, reliable measurement of all air velocity and IAQ parameters with the testo 440 dP: the multifunction measuring instrument features an integrated differential pressure sensor and intuitive operation with clearly structured measurement menus. Adjusting air conditioning and ventilation systems, monitoring air quality or carrying out comfort level measurements – thanks to versatile options for combining with high-quality, digital probes, you are ideally equipped to carry out your measuring task (please order probes separately).
With support for up to three probe connections simultaneously (Bluetooth®, wired, and type K thermocouple), the testo 440 dP ensures efficient and flexible measurement across various HVAC applications. Its intuitive menu structure supports standard-compliant measurements for turbulence, thermal comfort, long-term monitoring, and airflow, while its wireless capabilities reduce cable clutter on-site.
The device can store up to 7500 measurement reports, which can be exported via USB in CSV format for further analysis or documentation. Whether used for duct measurements, comfort studies, cleanroom monitoring, or IAQ assessments, the testo 440 dP is engineered for accuracy, ease of use, and operational efficiency in demanding environments.
testo 440 dP air velocity and IAQ measuring instrument including integrated differential pressure sensor, connection hose, 3 x AA batteries, USB cable and calibration protocol.
Temperature - NTC
| Measuring range | -40 to +150 °C |
|---|---|
| Accuracy | ±0.4 °C (-40 to -25.1 °C) ±0.4 °C (+75 to +99.9 °C) ±0.5 % of mv (Remaining Range) ±0.3 °C (-25 to +74.9 °C) |
| Resolution | 0.1 °C |
Temperature - TC Type K (NiCr-Ni)
| Measuring range | -200 to +1370 °C |
|---|---|
| Accuracy | ±(0.3 °C + 0.3 % of mv) |
| Resolution | 0.1 °C |
Differential pressure (internal sensor) - Piezoresistive
| Measuring range | -150 to +150 hPa |
|---|---|
| Accuracy | ±0.05 hPa (0 to 1.00 hPa) (1.01 to +150 hPa) ±0.2 hPa + 1.5 % of mv |
| Resolution | 0.01 hPa |
Comfort probes
Comfort probes
Turbulence probe (digital), wired: for determining the degree of turbulence and draught risk according to EN ISO 7730 / ASHRAE 55 – measuring range 0 to +5 m/s, 0 to +50 °C
:
0628 0152
0628 0152
Comfort probes
Lux probe (digital), wired: for measuring illuminance in workplaces (e.g. offices, production areas) – measuring range 0 to 100,000 lux
:
0635 0551
0635 0551
Comfort probes
CO₂ probe (digital) with Bluetooth® including temperature and humidity sensor: for measuring the indoor air quality in offices, production areas or storage facilities – measuring range 0 to 10,000 ppm, -10 to +50 °C, 5 to 95% RH
:
0632 1551
0632 1551
Comfort probes
CO₂ probe (digital) including temperature and humidity sensor, wired: for measuring the indoor air quality in offices, production areas or storage facilities – measuring range 0 to 10,000 ppm, -10 to +50 °C, 5 to 95% RH
:
0632 1552
0632 1552
Comfort probes
CO₂ probe head including temperature and humidity sensor: for attachment to universal Bluetooth® or cable handle – measuring range 0 to 10,000 ppm, -10 to +50 °C, 5 to 95% RH
:
0632 1550
0632 1550
Comfort probes
CO probe (digital) with Bluetooth®: for measuring carbon monoxide in indoor areas (e.g. boiler rooms) – measuring range 0 to 500 ppm
:
0632 1271
0632 1271
Comfort probes
CO probe (digital), wired: for measuring carbon monoxide in indoor areas (e.g. boiler rooms) – measuring range 0 to 500 ppm
:
0632 1272
0632 1272
Comfort probes
CO probe head: for attachment to universal Bluetooth® or cable handle – measuring range 0 to 500 ppm
:
0632 1270
0632 1270
Comfort probes
For the measurement of radiant heat according to ISO 7243, ISO 7726, DIN EN 27726 and DIN 33403
:
0602 0743
0602 0743
Food probes
Food probes
NTC temperature sensor
:
0615 3311
0615 3311
Food probes
Frozen food probe (NTC) for screw-in use without pre-drilling - measuring range -50 to +140 °C
:
0615 3211
0615 3211
Food probes
Robust food penetration probe (NTC) - measuring range -25 to +150 °C
:
0615 2411
0615 2411
Food probes
Stainless steel food probe (NTC) - measuring range: -50 to +150 °C
:
0615 2211
0615 2211
Humidity probes
Humidity probes
Humidity/temperature probe (digital) with Bluetooth®: for measurements in rooms, ventilation ducts, refrigeration systems and heat pumps – accuracy ±2% RH / ±0.5 °C, measuring range 0 to 100% RH / -20 to +70 °C
:
0636 9731
0636 9731
Humidity probes
Humidity/temperature probe (digital), wired: for measurements in rooms, ventilation ducts, refrigeration systems and heat pumps – accuracy ±2% RH / ±0.5 °C, measuring range 0 to 100% RH / -20 to +70 °C
:
0636 9732
0636 9732
Humidity probes
Humidity/temperature probe head: for attachment to universal Bluetooth® or cable handle – accuracy ±2% RH / ±0.5 °C, measuring range 0 to 100% RH / -20 to +70 °C
:
0636 9730
0636 9730
Humidity probes
High-precision humidity/temperature probe (digital) with Bluetooth®: for measurements in cleanrooms and laboratories, and critical processes in the pharmaceutical, industrial and food sectors, as well as in storage, refrigerated and work rooms or in air conditioning/ventilation ducts - accuracy: ±(0.6% RH + 0.7 % of m.v.) (0 to 90% RH) / ±0.3 °C (+15 to +30 °C)
:
0636 9771
0636 9771
Humidity probes
High-precision humidity/temperature probe (digital), wired: for measurements in cleanrooms and laboratories, and critical processes in the pharmaceutical, industrial and food sectors, as well as in storage, refrigerated and work rooms or in air conditioning/ventilation ducts - accuracy: ±(0.6% RH + 0.7 % of m.v.) (0 to 90% RH) / ±0.3 °C (+15 to +30 °C)
:
0636 9772
0636 9772
Humidity probes
High-precision humidity/temperature probe head: for attachment to a universal Bluetooth® or cable handle – accuracy: ±(0.6% RH + 0.7 % of m.v.) (0 to 90% RH) / ±0.3 °C (+15 to +30 °C)
:
0636 9770
0636 9770
Humidity probes
Robust humidity/temperature probe (digital) for temperatures up to +180 °C, wired: for measurements in industrial exhaust air, in bulk materials and in climatic test cabinets – accuracy ±2% RH (2.1 to 98% RH) / ±0.4 °C (0.1 to +50 °C), measuring range 0 to 100% RH / -20 to +180 °C
:
0636 9775
0636 9775
Humidity probes
Automatic calculation of the dew point and wet-bulb temperature
:
0560 1605
0560 1605
Humidity probes
testo 605i - thermohygrometer operated via smartphone
:
0560 2605 02
0560 2605 02
Pitot tubes
Pitot tubes
Stainless steel Pitot tube, length 500 mm, Ø 7 mm - for measuring flow velocity
:
0635 2045
0635 2045
Pitot tubes
Stainless steel Pitot tube, length 350 mm, Ø 7 mm - for measuring flow velocity
:
0635 2145
0635 2145
Pitot tubes
Stainless steel Pitot tube, length 1000 mm, Ø 7 mm - for measuring flow velocity
:
0635 2345
0635 2345
Pitot tubes
For measuring flow velocities, e.g. in ventilation ducts or process air
:
0635 2043
0635 2043
Pitot tubes
For measuring flow velocities, e.g. in ventilation ducts or process air
:
0635 2143
0635 2143
Pitot tubes
For measuring flow velocities, e.g. in ventilation ducts or process air
:
0635 2243
0635 2243
Pressure probes
Pressure probes
Measurement of gas flow and static pressure
:
0560 1510
0560 1510
Pressure probes
testo 549i - High-pressure gauge operated via smartphone
:
0560 2549 02
0560 2549 02
Surface probes
Surface probes
NTC temperature sensor – for high-precision measurements.
:
0615 1912
0615 1912
Temperature probes
Temperature probes
Non-contact infrared measurement of surface temperature
:
0560 1805
0560 1805
Temperature probes
Waterproof immersion/penetration probe (NTC temperature sensor) for temperature measurements in liquids and semi-solid media – measuring range -50 to +150 °C, accuracy ±0.2 °C (-25 to +74.9 °C)
:
0615 1212
0615 1212
Temperature probes
Robust air probe (NTC temperature sensor) with a short response time, for measuring air temperature – measuring range -50 to +125 °C, accuracy ±0.2 °C (-25 to +80 °C)
:
0615 1712
0615 1712
Temperature probes
Clamp probe (NTC temperature sensor) for measuring the surface temperature of pipes (Ø 6-35 mm) – measuring range -40 to +125 °C
:
0615 5505
0615 5505
Temperature probes
Short response time – due to exposed sensor design.
:
0602 1793
0602 1793
Temperature probes
Fast response time (3 seconds) thanks to the thermocouple strip
:
0602 0393
0602 0393
Temperature probes
Fast-reaction paddle surface probe (TC type K) - Measuring range: - 0 to +300°C
:
0602 0193
0602 0193
Temperature probes
Fast Response Time – Ensures quick and accurate measurements.
:
0602 0693
0602 0693
Temperature probes
Fast response time (3 seconds) thanks to the thermocouple strip
:
0602 0993
0602 0993
Temperature probes
Thermocouple type K
:
0602 4792
0602 4792
Temperature probes
Self-adhesive thanks to a magnet: probe for measuring surface temperature on metal surfaces
:
0602 4892
0602 4892
Temperature probes
Extra-wide measuring tip – ideal for accurate readings on flat surfaces.
:
0602 1993
0602 1993
Temperature probes
With Velcro: makes it easy to attach the surface probe to pipes with a diameter of up to 120 mm
:
0628 0020
0628 0020
Temperature probes
With clamping bracket: enables quick, easy attachment of the probe to pipes with a diameter of 5 to 65 mm
:
0602 4592
0602 4592
Temperature probes
Clamp probe (TC type K) for temperature measurements on pipes with Ø 15-25 mm – Measuring range -50 to +100°C, briefly up to +130°C
:
0602 4692
0602 4692
Temperature probes
Short response time of 2 seconds
:
0602 0593
0602 0593
Temperature probes
Fast 3-Second Response Time – Thermocouple strip enables quick and precise measurement.
:
0602 2693
0602 2693
Temperature probes
Immersion measuring tip with TC plug type K - for fast temperature measurements
:
0602 5792
0602 5792
Temperature probes
Flexible immersion measuring tip (TC type K) - Measuring range: -40 to +1000°C
:
0602 5693
0602 5693
Temperature probes
Fast response time – approx. 7 seconds.
:
0602 1293
0602 1293
Temperature probes
TC Type K temperature probe with flexible measuring tip, short response time and 2 m cable
:
0602 0493
0602 0493
Temperature probes
Waterproof stainless steel food probe (TC type K) - measuring range: -60 to +400°C
:
0602 2292
0602 2292
Temperature probes
Flexible thermoelectric couple (TC type K, glass fibre) – Measuring range: -50 to +400°C
:
0602 0644
0602 0644
Temperature probes
Flexible thermoelectric couple (TC type K, glass fibre) – measuring range -50 to +400°C
:
0602 0645
0602 0645
Temperature probes
Flexible thermoelectric couple (TC type K, PTFE) – measuring range -50 to +250°C
:
0602 0646
0602 0646
Temperature probes
Flexible temperature probe (digital) with Pt100 temperature sensor: for temperature measurements in locations that are difficult to access and in liquids – measuring range -100 to +260 °C
:
0618 0071
0618 0071
Temperature probes
Robust, fast-action air probe (digital)
:
0618 0072
0618 0072
Temperature probes
Immersion/penetration probe (digital) with Pt100 temperature sensor: for temperature measurements in liquids and pastes – measuring range -100 to +400 °C, accuracy up to ±0.15 °C
:
0618 0073
0618 0073
Temperature probes
Glass-coated laboratory probe (Pt100 temperature sensor, digital) for temperature measurements in aggressive media – measuring range -50 to +400 °C
:
0618 7072
0618 7072
Temperature probes
High-precision immersion/penetration probe (Pt100 temperature sensor, digital) for temperature measurements in liquids and pastes – measuring range -80 to +300 °C, accuracy up to ±0.05 °C
:
0618 0275
0618 0275
Temperature probes
Pipe wrap probe (NTC temperature sensor) for measuring the surface temperature of pipes (Ø 5-65 mm) – measuring range -60 to +130 °C
:
0615 5605
0615 5605
Temperature probes
testo 115i - Clamp thermometer operated via smartphone
:
0560 2115 02
0560 2115 02
Velocity
Velocity
Hot wire probe (digital) with Bluetooth® including temperature and humidity sensor: for measurements in ventilation ducts – measuring range 0 to +30 m/s, -20 to +70 °C, 5 to 95% RH
:
0635 1571
0635 1571
Velocity
Hot wire probe (digital) including temperature and humidity sensor, wired: for measurements in ventilation ducts – measuring range 0 to +30 m/s, -20 to +70 °C, 5 to 95% RH
:
0635 1572
0635 1572
Velocity
Hot wire probe head including temperature and humidity sensor: for attachment to extendable telescope for air velocity probes with universal handle – measuring range 0 to +30 m/s, -20 to +70 °C, 5 to 95% RH
:
0635 1570
0635 1570
Velocity
Vane probe (Ø 16 mm, digital) with Bluetooth® including temperature sensor: for measurements in ventilation ducts – measuring range +0.6 to +50 m/s, -10 to +70 °C
:
0635 9571
0635 9571
Velocity
Vane probe (Ø 16 mm, digital) including temperature sensor, wired: for measurements in ventilation ducts – measuring range +0.6 to +50 m/s, -10 to +70 °C
:
0635 9572
0635 9572
Velocity
16 mm vane probe head including temperature sensor; for attachment to extendable telescope for air velocity probes with universal handle – measuring range +0.6 to +50 m/s, -10 to +70 °C
:
0635 9570
0635 9570
Velocity
Hot wire probe (digital) including temperature sensor, wired: for measurements in ventilation ducts – measuring range 0 to 30 m/s, -20 to +70 °C
:
0635 1032
0635 1032
Velocity
Vane probe (Ø 16 mm, digital), wired: for measurements in ventilation ducts – measuring range +0.6 to +50 m/s
:
0635 9532
0635 9532
Velocity
Fume cupboard probe (digital), wired: for measuring inflow speed and exhaust air volume flow in fume cupboards according to DIN EN 14175-3/-4 – measuring range 0 to 5 m/s, 0 to +50 °C
:
0635 1052
0635 1052
Velocity
High-precision vane probe (Ø 100 mm, digital) with Bluetooth® including temperature sensor: for measurements at air outlets in cleanrooms and at plate outlets, ventilation grilles or swirl outlets – measuring range +0.1 to +15 m/s, -20 to +70 °C
:
0635 9371
0635 9371
Velocity
High-precision vane probe (Ø 100 mm, digital) including temperature sensor, wired: for measurements at air outlets in cleanrooms, as well as at plate outlets, ventilation grilles or swirl outlets – measuring range +0.1 to +15 m/s, -20 to +70 °C
:
0635 9372
0635 9372
Velocity
High-precision 100 mm vane probe head including temperature sensor: for attachment to extendable telescope for air velocity probes with universal handle or to a universal Bluetooth® or cable handle – measuring range +0.1 to +15 m/s, -20 to +70 °C
:
0635 9370
0635 9370
Velocity
Vane probe (Ø 100 mm, digital) with Bluetooth® including temperature sensor: for measurements at ceiling/air outlets and at plate outlets, ventilation grilles or swirl outlets – measuring range +0.3 to +35 m/s, -20 to +70 °C
:
0635 9431
0635 9431
Velocity
Vane probe (Ø 100 mm, digital) including temperature sensor, wired: for measurements at ceiling/air outlets and at plate outlets, ventilation grilles or swirl outlets – measuring range +0.3 to +35 m/s, -20 to +70 °C
:
0635 9432
0635 9432
Velocity
100 mm vane probe head: for attachment to extendable telescope for air velocity probes with universal handle or to universal Bluetooth® or cable handle – measuring range +0.3 to +35 m/s, -20 to +70 °C
:
0635 9430
0635 9430
Velocity
For measuring volume flow, air velocity and temperature
:
0560 1405
0560 1405
Velocity
Measurement of air velocity, volume flow and temperature
:
0560 1410
0560 1410
Velocity
Hot ball probe (Ø 3 mm, digital), incl. temperature sensor, fixed cable: for measurement in non-directional air flows – measuring range 0 to 10 m/s, -20 to +70 °C
:
0635 1051
0635 1051
Velocity
Hot wire probe (Ø 7.5 mm, digital), incl. temperature sensor, fixed cable: for measurement in ventilation ducts, at plate outlets, ventilation grilles – measuring range 0 to 20 m/s, -20 to +70 °C
:
0635 1026
0635 1026
Sets
Sets
testo 440 delta P Air Flow ComboKit 1 with Bluetooth® for carrying out measurements in ventilation ducts and at air/ceiling outlets. Convenient measurement of air velocity and volume flow (with vane probe Ø 100 mm and hot wire probe head Ø 9 mm), differential pressure, humidity and temperature in ventilation ducts and at air/ceiling outlets
:
0563 4409
0563 4409
Sets
testo 440 delta P Air Flow ComboKit 2 with Bluetooth®: for carrying out measurements in ventilation ducts, at air/ceiling outlets and in offices. Convenient measurement of air velocity and volume flow (with vane probe Ø 100 mm or vane probe head Ø 16 mm), differential pressure, humidity and temperature
:
0563 4410
0563 4410
Accessories
Accessories
Measuring tripod for IAQ and comfort level measurements, to ensure standard-compliant, secure positioning of measuring instrument and probes including transport bag
:
0554 1591
0554 1591
Accessories
Bluetooth® handle for connecting probe heads: transmits readings conveniently via Bluetooth
:
0554 1111
0554 1111
Accessories
Cable handle for connecting probe heads: transmits readings via cable
:
0554 2222
0554 2222
Accessories
?, Enables accurate volume flow measurement – even at turbulent swirl outlets.
:
0554 4173
0554 4173
Accessories
Convenient, quick volume flow measurement
:
0563 4170
0563 4170
Accessories
testo 318 - Endoscope
:
0563 3185
0563 3185
Accessories
Mobile BLUETOOTH®/IRDA printer
:
0554 0622
0554 0622
Accessories for measuring instrument
Accessories for measuring instrument
USB mains unit incl. cable
:
0554 1105
0554 1105
Accessories for measuring instrument
Connection hose, silicone - max. load capacity up to 700 hPa (mbar)
:
0554 0440
0554 0440
Accessories for measuring instrument
Connection hose silicone-free for differential pressure measurement, length 5 m, load up to maximum 700 hPa, (mbar)
:
0554 0453
0554 0453
Further accessories measuring instrument/probes
Further accessories measuring instrument/probes
Enables accurate volume flow measurement – even at turbulent swirl outlets.
:
0554 4172
0554 4172
Transport and Protection
Transport and Protection
Combi-case for testo 440 and multiple probes; for protecting and transporting the testo 440 (dP) air velocity and IAQ measuring instrument and multiple probes
:
0516 4401
0516 4401
Transport and Protection
Service case for volume flow measurement; for protecting and transporting the testo 440 (dP) air velocity and IAQ measuring instrument, probes and accessories for measuring volume flow
:
0516 4900
0516 4900
Long-term monitoring of indoor air quality
Poor indoor air quality due to excessive concentrations of CO2 can cause tiredness, lack of concentration and even illness. With its menu for recording readings, the testo 440 air velocity and IAQ measuring instrument is ideal for monitoring the indoor air quality. Enter the measurement time and the measuring cycle – and, for example, track the change in CO2 concentration or humidity and temperature values over the course of the day. Simply choose between probes with Bluetooth or fixed cable for CO2, CO or humidity (please order probes separately).
Convenience and maximum flexibility for duct and outlet measurements
With our large range of air velocity probes (please order separately), you can carry out simple and convenient measurements even at locations that are difficult to access in ventilation ducts or at air outlets:
you will even find it easy to carry out measurements in particularly large ducts. This is because the extendable telescope on the hot wire and vane probe (Ø 16 mm) with universal handle can be further extended using the telescope extension – enabling you to attain a total length of 2 metres.
Carry out measurements at air/ceiling outlets effortlessly and without using a ladder. Fit your vane probe (Ø 100 mm) with the telescope with 90° angle and, if necessary, with the telescope extension (both can be ordered separately).
Greater freedom thanks to Bluetooth: the air velocity probes with Bluetooth have no inconvenient cable connection to the measuring instrument, and they transmit readings up to a distance of 20 m. Press the button on the probe to operate the measuring instrument – for example, to start and stop a series of measurements (timed mean calculation).
Attach the testo 440 air velocity and IAQ measuring instrument to metal surfaces (e.g. ducts) easily using the practical magnets.
Benefit from fast calculation of the volume flow: in the “volume flow” measurement menu of the multifunction measuring instrument, configure the dimensions and geometry of the duct cross-section – the measuring instrument shows you the volume flow straight away.
you will even find it easy to carry out measurements in particularly large ducts. This is because the extendable telescope on the hot wire and vane probe (Ø 16 mm) with universal handle can be further extended using the telescope extension – enabling you to attain a total length of 2 metres.
Carry out measurements at air/ceiling outlets effortlessly and without using a ladder. Fit your vane probe (Ø 100 mm) with the telescope with 90° angle and, if necessary, with the telescope extension (both can be ordered separately).
Greater freedom thanks to Bluetooth: the air velocity probes with Bluetooth have no inconvenient cable connection to the measuring instrument, and they transmit readings up to a distance of 20 m. Press the button on the probe to operate the measuring instrument – for example, to start and stop a series of measurements (timed mean calculation).
Attach the testo 440 air velocity and IAQ measuring instrument to metal surfaces (e.g. ducts) easily using the practical magnets.
Benefit from fast calculation of the volume flow: in the “volume flow” measurement menu of the multifunction measuring instrument, configure the dimensions and geometry of the duct cross-section – the measuring instrument shows you the volume flow straight away.
Turbulence measurement in accordance with EN ISO 7730 / ASHRAE 55
Determine the degree of turbulence and the draught risk in the workplace: draught restricts the comfort level and is the most common cause of complaints about the indoor climate. The turbulence probe (please order separately) measures air velocity and air temperature, and automatically calculates the draught risk and the degree of turbulence in accordance with EN ISO 7730/ASHRAE 55.
For convenient measurements at varying heights, we recommend using our measuring tripod for comfort level measurement (please order separately). This makes it very easy to position turbulence probes in compliance with the standards.
For convenient measurements at varying heights, we recommend using our measuring tripod for comfort level measurement (please order separately). This makes it very easy to position turbulence probes in compliance with the standards.
Range of probes for cleanrooms and laboratories
The testo 440 air velocity & IAQ measuring instrument is also ideal for a wide variety of applications in cleanrooms and laboratories in conjunction with the following probes:
- High-precision flow measurement in fume cupboards with the fume cupboard probe
- Thanks to the low start-up speed of 0.1 m/s, the high-precision vane probe (Ø 100 mm) is ideal for laminar flow measurements in cleanrooms. It is available as a variant with Bluetooth or with fixed cable
- To measure the humidity in cleanrooms, we recommend the high-precision humidity/temperature probe (0636 9771 or 0636 9772). With an accuracy of ±(0.6 %RH + 0.7% of m.v.) (0 to 90 %RH), it also meets the requirements for humidity measurements in this particularly sensitive area
- Use the high-precision digital Pt100 temperature probes, for example, for high-precision comparative measurements in calibration laboratories, temperature measurements in chemical laboratories or in the cosmetics industry as well as for determining the temperature distribution in refrigerators and conditioning cabinets
- Data sheet testo 440(pdf, 3.12 MB)
- UK Declaration of Conformity testo 440 dP(pdf, 58.73 kB)
- Instruction manual testo 440(pdf, 1.63 MB)
- Approval and Certification testo 440(pdf, 210.19 kB)
- Firmware update testo 440(v1.0.8, 3.15 MB)see instruction manual for instructions on how to update your device