... design, un-affected by wind, ice, snow Buzzer Car Parking SensorModel: PST-PSB3920Specifications: Measuring the distance by radarAlarm ... by three step Bi-Bi sound 2-4 sensors are availableHigh,Low,Off three step switch ... by wind, ice, snow & rainAll kinds of sensor colors and styles are availableHigh quality and easy to ... 40KHzDisplay Working Temperature: -30 ~ +70°C Buzzer Car Parking Sensor