Features & Functions: 1. The host and display is a wireless link 2,Numeral and color LED display 3. Alarm by three-step Bibi sound 4, Left and right obstacle indication 5,Numeral display from 2.0m to 0m<br><br>voltage:9DCV-15DCV Rated voltage:12DCV Power cost: Max 0.5W Respond distance:0.-2.0m Alarm distance:0m-2.0m Display mode: Led display Sensor diameter:22mm Install mode: dritt Sensor angle: X,Y,600C work temperature:-30~+80 Alarm type: Buzzer (Bi Bi....) FM power:10mw FM Frenquency:433MHZ Color: Black Material: plastic<br><br>Package Contents: 1 x Parking Sensor 1 x English instruction manual<br><br>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.