3 Fan Blades Tower Crane Anemometer 3 Blades USB Wind Speed Alarm Device for Outdoor 1. With the Connection Line Function: Power off after alarm, you can control the equipment that the customer wants to control, and the wind level be powered off to the set level. 2. Three Cup Wind Cup: The anemometer adopts three cup wind speed measurement, 360° wind speed measurement, high accuracy. 3. Wide Measuring Range: Wind speed alarm measuring range is wide, anti interference ability is strong, with anti electromagnetic interference function. 4. Power Failure Memory Function: The digital circuit of the wind speed alarm adopts a CMOS chip with power failure memory function, which saves time and power. 5. In Normal Operation: The window wind speed shows the current actual wind speed; Set wind level to display the current alarm wind level; Maximum Wind level Indicates the maximum wind level of the day. Item Type: Fan Blades Tower Crane Anemometer Power Supply: USB 5V Application Scenario: wind speed measurement in power plant, weather station Wind Level Accuracy: 0.3 Set Wind Level: 2-12 (can be set by 0.5 / each time) Accuracy: ±5% Starting Wind Speed: 0.7m/s Operating Temperature: -30-65℃ Color:As Shown Material:plastic Package Contents: 1 x Alarm Wind Speed Meter with Cable set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.