Measuring the distance by radar Full-weather design, un-affected by wind, ice, snow and rain All kinds of sensor colors and styles are available High quality and easy to install Technical parameters: Rated voltage: 12V DC Operating range: 10.5V - 16V DC Rated current: 50mA - 180mA Detecting distance: 0.3 - 1.5m Ultrasonic frequency: 40KHz Working temperature: -30 to +70 deg. C