Item Type: Tower crane anemometer_x000D_Material: Aluminium alloy, ABS_x000D_Weight: Approx. 990g / 34.9oz_x000D_Power Supply: USB 5V_x000D_Input Voltage(Actual Withstand Voltage): 220V_x000D_Product Size(host): 18.3x10.5x5.1cm / 7.2x4.1x2in_x000D_Host Installation Diameter: 17cm / 6.7in_x000D_Fan Blade Installation Diameter: 4cm / 1.6in_x000D_Fan Blade Cable: 8m / 26.2ft_x000D_Application: Weather station, wind speed measurement_x000D_Wind Level Accuracy: 0.3 level_x000D_Setting Wind Level: 2 to 12 levels (can be set sequentially at 0.5 levels each time)_x000D_Accuracy: 5%_x000D_Starting Wind Speed: 0.7m/s_x000D_Working Temperature: -30-65C 1POWER CONTROL FUNCTION: This wind speed alarm can control the equipment that you want to control in case of an emergency, and automatically cut off power when the wind speed reaches the set level. 23 FAN BLADES DESIGN: This wind speed meter uses a 3 fan blades for accurate 360 degrees wind speed measurement, ensuring high accuracy. 3WIDE MEASUREMENT RANGE: The wind speed alarm meter has a wide measurement range and strong anti interference ability, with built in electromagnetic interference resistance. 4POWER FAILURE MEMORY FUNCTION: This wind speed meter uses a CMOS chip with power failure memory function, saving time and energy. 5WIND SPEED DISPLAY: The display of this wind speed alarm shows various wind values including current actual wind speed, wind speed level and maximum wind speed level, providing you with pleasant experience. 1 x Host 1 x Connection Cable 1 x Fixing Bracket 1 x Bracket Accessory 5 x Screw 5 x Nut 1 x Fan Blade with Cable