Feature: 1. Digital anemometer, measure wind speed, maximum value, minimum value, average value, data hold, temperature and humidity, etc. 2. Multiple wind speed units can be selected from m/s, km/h, ft/min, knots, mph, to meet different measurement requirements. 3. Used for industrial and household purposes, to measure wind speed and temperature of CPU computer fans, air conditioners, blowers, and kite flying. 4. The retractable handle design, about 53.6cm / 21.1in long, and the high vents can also be easily measured. 5. Support wind volume 2/3 Maximum value, average value measurement, high measurement accuracy, compact and portable. Specification: Item Type: Anemometer Material: ABS Wind Speed Measurement Range: 0.0-45.0m/s 0.0-8850Ft/min 0.0-87.5Knots 0.0-160.0Km/h 0.0-100Mph Wind Volume Measurement Range: CFM: 0-999900 Ft3/min CMM: 0-999900m3/min Wind Temperature Measurement Range: 0-45 32-113 Humidity Measurement Range: 10-90%RH Power Supply: 4 x 1.5V AAA Alkaline Battery (Battery Not Included) How to Use: 1: The wind speed probe handle is connected to the host. 2: Install 4 x 1.5V AAA dry battery (this product does not include) 3: Press the power on, short press the power button for 2s to backlight, UNIT unit switching, AREA/SAMPLE recording time interval, VEL/FLOW wind speed and air volume switching, READ reading and storing recording interface, REC keeping data once, DEL deleting data interface, Maximum/Minimum values, ENTER confirmation button 2/3V Maximum, HOLD data retention. Package List: 1 x Anemometer (Host+Probe)1 x Plastic Box1 x Manual Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.