Accuracy: 0.5m/S(<5m/S) Output: Pulse Signal/0-5VDC/4-20mA/RS485 Testing Range: 0.5m/S~60m/S Working Voltage: 5V DC 24VDC 12V DC Start Wind Speed: 0.5m/S Working Environment: -20c~+85c Humidity≤95%Rh