Description * Anemometer, Barometer, Humidity, Temperature meter, 4 in one, professional. * Anemometer unit : m/S, Km/h, FPM, mph, Knot. * Barometer unit : hPa, mmHg, inHg. * Humidity with Dew point measurement * Temperature measurement with °C, °F unit. * Vane anemometer, available for wind speed measurement, high reliability. * Fast response time for humidity measurement. * Atmosphere measurement with high accuracy. * Two display can select the six mode ( function ) : Humidity/Temp., Humidity/Dew point, Anemometer/Temp., Barometer/Temp. Barometer/Humidity, Barometer/Anemometer, * 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 high and low velocities. * Durable, long-lasting components, enclosed in strong, compact ABS-plastic housing.