Description Features: Anemometer, Temperature meter, two in one, professional. Anemometer unit: m/S, Km/h, FPM, mph, Knot. Temperature measurement with Degree Celsius, Degree Fahrenheit unit. Vane anemometer, available for air velocity measurement, high reliability. Two display show air velocity and temperature value at the same time. 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. Product Specifications GENERAL Air Velocity Range: 0.4 to 30.0 m/s Battery Type: DC 1.5 V battery 4 Nos Brand: Lutron Dimensions: 205x48x40 mm LCD Display Size: 28×19 mm Model: AM 4222 Sampling Time: 1 Sec Temperature Range: 50 degree celsius