Features: 1: With 6 Digital numbers, it can display the distance of obstacles. It is more helpful 2: There is a light bar on the display, which can distinguish different 3: Buzzer reminder, when the obstacle is closer, the alarm will be faster. Specification: 1: Rated voltage: 12V DC 2: Rated current: 100mA-300mA 3: Ultrasonic frequency: 40KHz 4: Control module operating temperature: -30-80 degrees Celsius 5: Display working temperature: -20-70 degrees Celsius 6: Sensor diameter: 22mm 7: Installation : drilling Material: plastic Color: as shown Package Contents: 1 x Reversing radar 1 x With 2.5M line 1 x Hole Saw 1 Cable 1 x Double Side Sticker 1 x English Manual 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.