Vane Sensor for Air Velocity (Accuracy +/- 3-Percent) - LCD Display - Operating Temperature: 32-Degree F to 122-Degree F * Five Units Of Measure: Ft/Min, M/Sec, MPH, Km/Hr, Knots - Data Hold - Power Supply: 9V Battery * Sensor Structure: Conventional Twisted Vane Arm with Friction Ball Bearing - Max/Min Key * Temperature Sensor for Temperature (Accuracy +/- 4-Degree F) - On/Off Key * Unit Switch (-DegreeF/-DegreeC) Key - Auto Power Off After 15 Minutes * Auto Power Off After 15 Minutes * Data Hold * Five Units Of Measure: Ft/Min, M/Sec, MPH, Km/Hr, Knots * LCD Display * Max/Min Key * On/Off Key * Operating Temperature: 32° F to 122° F * Power Supply: 9V Battery * Sensor Structure: Conventional Twisted Vane Arm With Friction Ball Bearing * Sold as : Unit * Temperature Sensor For Temperature (Accuracy +/- 4° F) * Unit Switch (°F/°C) Key * Vane Sensor For Air Velocity (Accuracy +/- 3%)