Features： 1、With Connecting Line Role: Alarm power off with, you can control the customer wants to control the equipment, wind level to the set level will be powered off. 2、3 Fan Blades: This anemometer adopts wind speed measurement with three cups fan blades, aluminum wind cup, wearproof and durable, 360 degree wind speed measurement with high accuracy. 3、Wide Measuring Range: The wind speed alarm has a wide measuring range and strong anti interference ability, with anti electromagnetic interference function. 4、Power Failure Memory Function: The digital circuit of wind speed alarm adopts CMOS chip with power failure memory function, which saves both time and power. 5、Wind Speed Display: Window Wind Speed displays the current actual wind speed; Set Wind Level displays the current alarm wind level; Maximum Wind Level displays the maximum wind level of the day. Specification： Item Type: Wind Speed Alarm Device Weight: 1105g / 38.98oz Material: Aluminum Alloy Power Supply: USB 5V Input Voltage (actual withstand voltage): 220V Host Size: Approx. 18.3x10.5x5.1cm / 7.2x4.1x2.0in Host Mounting Aperture: Approx. 17cm / 6.69in Wind Cup Installation Aperture: Approx. 4cm / 1.57in Wind Cup Cable: Approx. 8m / 26.24ft Applicable Scenario: Power plant wind speed measurement, weather station Wind Level Accuracy: 0.3 level Wind Level Setting: 2-12 levels (can be set sequentially at 0.5 levels/each time) Accuracy: ±5% Starting Wind Speed: 0.7m/s Working Temperature: -30-65 DegreeC Package List： 1 x Host 1 x Connection Cable 1 x Fixed Bracket 1 x Fixed Bracket Accessories 5 x Screw 5 x Nut 1 x Wind Cup with Cable