1.Frequency: 2.4GHz
2.display picture behind vehicle
3.automatic start when back up
4.Wide visiable area from camera
5.Good night vision
6.waterproof camera in 120 degree
7. Distance of wireless :20M with obstacle
8.with 3.5" LCD monitor and good cmos camera
Specification

Monitor:
1. panel:  Au TFT LCD
2. screen size:3.5inches
3. display color:262K
4. Pixel: 480X234
5. brightness: 250nit
6. contrast: 150:1
7. Five languages OSD menu
8. respond time:30ms
9. The display with two video (AV1, AV2) Automatic/manual switcher
10. Display format:4:3
11. system: PAL/NTSC
12. input power:DC12V
13. Front panel controls with on-screen menu
14. Full function wireless remote control
15. Shock resistant, designed specifically for mobile use

Instruction
1. Rated voltage: DC12V
2. Operating range: DC10V~15V
3. Power: 4W
4. Detecting distance: 1.5M~0.3M
5. Detecting angle: H>60 degree, V>60 degree
6. Microphone sensitivity: >=73dB
7. Speaker power: 8 ohm, 0.5W