Features: Step-up buzzer alarm Detective distance from 0.3-2m Can be connected with camera and any rearview monitor and display distance on the monitor Parameter: Current: Less than200mA Input Power: 12V DC Working temperature: -30°C~+ 70°C Voice Alarm: 80dB Ultrasonic frequency: 40 KHz Sensor detection range: 0~ 2.0m Diameter of sensor: 16.5mm Material: plastic colour: black Package Contents: 1 set reversing radar 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.