BT-816B 2-Packs Product Description 816B handheld anemometer is a portable and professional measuring instrument with with large- screen LCD. Wind speed unit is switchable: m/s, km/h, ft/min, knots or mph. This handy palm sized anemometer is ideal compatible for weather enthusiast, lovers of kite flying, kite-surfing, wind-surfing, paragliding and sailors. Functions Wind speed & temperature measurement Wind chill indication Temperature: display in Celsius Or Fahrenheit Different wind speed measurement unit Measure wind speed in: Current/Average/Max Low battery warning LCD back-light Auto/Manual off Specifications Wind speed range Unit Range Resolution Threshold Accuracy M/s 0~30 0.1 0.1 5% Ft/min 0~5860 19 39 Knots 0~55 0.2 0.1 Km/h 0~90 0.3 0.3 Mph 0~65 0.2 0.2 Temperature range Unit Range Resolution Accuracy -10~45 0.2 2 14~113 0.36 3.6 Battery CR2032 3.0V Thermometer NTC thermometer Operating temperature -10~4514~113 Operating humidity 90%RH Store temperature -40~60-40~140 Current consumption About 3mA Weight 53gwith battery land yard Professional Support Team We provide after-sales e-mail, you can send e-mail to consult when you encounter problems. To make sure you can receive immediate solution and your requests processed quickly, please email us with these incompatible for mation: 1. Order Number 2. Platcompatible for m of Your Purchase 3. Full Model Number 4. Description of the ProblemAttaching videos or photos can help us troubleshoot the problems even faster