Features: 1) 4.5 B/W or green screen high definition CRT monitor 2) Wide range voltage input with 11-32V DC 3) 2-way video input and 1-way video output 4) Built-in speaker 5) Erecting/mirror prism switch 6) With waterproof infrared CCD camera 7) Automatic/manual selection 8) Automatically switch cameras from C2 to C1 when backing the car 9) Day/night brightness with auto-selection 10) With contrast/brightness/volume switch 11) Dual-side PCB board to strengthen anti-seismic intensity effectively (6.8g) 12) One full set including: a monitor, CCD camera, 20m cable Inner packing: 1set/white box (color box) Box dimensions: 28 x 25 x 18cm G.W.: 3.2kg Outer packing: 4sets/ctn Carton dimensions: 50.5 x 26.5 x 33.8cm G.W.: 14.5kg