Item Type: Wind Speed Meter <br>Material: ABS <br>Size: Length: Approx. 24.7cm / 9.7in Width: Approx. 9.9cm / 3.9in <br>Battery Model: 3 x AA batteries shipped (delivered without batteries) <br>Four, use method <br>Function Key Description: <br>1. A/B: Wind speed function key, used to switch between (A) instantaneous wind speed and (B) average wind speed. <br>2. C/D/E: Wind level power bear key, used to switch between (C) instantaneous wind level (D) and equal wind level (E) corresponding waving height. <br>3. HOLO: Lock function key, used to lock the current measured value and return to the lock. <br>4. ON/OFF: The power switch key is used to turn the instrument power on and off.<br>1、This instrument has the advantages of small size, light weight, complete functions, low power consumption and convenient operation. <br>2、Can be widely used in agriculture, forestry, environment, ocean, school teaching and other fields. <br>3、This instrument is a handheld wind cup anemometer with low power consumption design, LCD display, energy saving and clear display. <br>4、The instrument uses a new type of microcomputer technology with high sensitivity and fast calculation speed. <br>5、The five parameters of instantaneous wind speed, average wind speed, instantaneous wind level, average wind level, and corresponding waving height can be measured simultaneously.1 x Wind Speed MeterManual measurement, for reference only.