Check the listing for details. Anemometer Air Velocity Wind Speed Temperature Test Meter 2in1 USB Bluetooth App. Condition: New. Listed at 45.00 USD. Features:1. Measurement of wind speed and temperature2. Wind cold indicator3. Switch wind speed units4. Real-time measurement of wind speed and average windspeed5. Measurement of maximum wind speed and minimum windspeed6. Switch between Fahrenheit and Celsius unit7. Timed automatic shutdown (automatic shutdown after10mins of no button operation)8. LED lighting9. Measurement of air volume10. USB communication (with computer applications)11. Bluetooth communication (with mobile APP) Specifications: Wind velocity measurement Unit Measure range Resolution Threshhold Accuracy m/s 0-30 0.01 0.3 +-5%+-0.1 ft/min 0-5860 1.968 60 +-5%+-20 knots 0-55 0.019 0.6 +-5%+-0.2 km/h 0-90 0.036 1 +-5%+-0.4 mph 0-65 0.022 0.7 +-5%+-0.2 Wind temperature measurement Unit Measure range Resolution Accuracy C -10 - 45 C 0.1 +-2C F 14F - 113F 0.2 +-3.6F Battery 9V (6F22) (not included) Temperature sensor Negative Temperature coefficient Resistance Operation temperature -10 to 45C （14F - 113F) Operation Humidity Less than 90%RH Storage temperature -10 - 50C (14F - 122F) Size 165x85x39mm Weight 186g Note: we'll ship this item via SpeedPAK to USA, Canada and Australia, usually the delivery time is about 3 weeks; For other countries, we will ship it via registered air mail of China Post, usually the delivery time is about 40 days. If you want express mail service, pls contact us for extra postage in advance.