1.This system combine one sensor and one car camera, it is no need drill hole on the bumper ,camera and sensor both are installed on car lincense plate. show the image and distance on the monitor or DVD display ,with BIBI alarm 2, Measure distance between 0.32.0M with Bibi Alarm 3, the color OSD digital and park line show on the screen. 4, High definition camera and wide angel . 5, Alarm by BI-BI. 6, High quality and easy to install Technical specification: Voltage: 9DCV-15DCV Rated voltage: 12DCV Power cost: Max 1.0W "Drill diameter: 18.5mm / 16mm "Image sensor: 1/4inch color CMOS (7070) Total Pixels: 648*488 pixels Resolution: 420 TVL (Enhanced) View Angle: 170 degree Video output: 1.0 Vpp composite video at 75ohm Package include: 1 x HD Camera with Radar Sensor 1 x Alarm Sensor 2 x Power Cable 1 x English User Manual