Features： 1、With the Connection Line: Power off after alarm, you can control the customer wants to control the equipment, the wind level to the set level will cut off the power. 2、Three Cups Type Wind Cup: This anemometer adopts wind speed measurement with three cups type wind cup, 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、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. 6、Prime Material: Aluminum alloy wind cup, wear resistant and durable, rust resistant, can be used for a long time, suitable for outdoor environment. Specification： Item Type: Tower Crane Anemometer Weight: 694g / 24.5oz Material: Aluminum, Plastic Power Supply: USB 5V Host Size: Approx. 11.5x6x3cm / 4.5x2.4x1.2in Host Mounting Aperture: Approx. 1.5x3.9cm / 0.6x1.5in Wind Cup Installation Aperture: Approx. 4cm / 1.6in Wind Cup Cable: Approx. 8m / 26.2ft Applicable Scenario: Power plant wind speed measurement, weather station Wind Level Accuracy: 0.3 level Setting Wind Level: 2-12 levels (can be set sequentially at 0.5 level/each time) Accuracy: ± 5% Starting Wind Speed: 0.7m/s Working Temperature: -30-65 DegreeC Package List： 1 x With Cable Wind Cup Main Unit 1 x USB Cable 1 x Fixed Holder 1 x Fixed Bracket Accessories 5 x Screw 5 x Nut