* Anemometer, Humidity, Temperature meter, 4 in one, professional. * Anemometer unit : m/S, Km/h, FPM, mph, Knot. * Humidity with Dew point measurement * Temperature measurement with ,..unit. * Vane anemometer, available for wind speed measurement, high reliability. * Fast response time for humidity measurement. * Two display can select the three mode ( function ) : Humidity/Temp., Humidity/Dew point, Anemometer/Temp.. * Bright LCD display. * Microprocessor circuit ensures high accuracy and provides special functions and features. * Records Maximum and Minimum readings with recall. * Auto power off saves battery life. * Operates from DC 1.5V ( UM4/AAA ) x 4 PCs batteries. * Low-friction ball vane wheels is accurate in both highand low velocities. * Durable, long-lasting components, enclosed in strong, compact ABS-plastic housing.