Rechargeable battery,it has a strong magentic base so it can be absorbed anywhenre and not easily fall down. Driver just connect the backup camera with Wifi to the 5" LCD monitor and see the rear view from the screen,HD 1080P 5" monitor with 720P camera, suction cup mount to vehicle windscreen or dash mount, suitable for Engineering Vehicles  RV Camper 5th Wheel Horse Trailer Boat Trailer etc.

5″ 2.4G Digital Wireless Monitor Specs:
Screen resolution:800*480*RGB 
Screen ratio:16:9 IPS
Backlight:LED, brightness  500cd/m2
Viewing angle: U/D: 85/85 L/R: 85/85   
Display channel: Support 2 channel
Frequency Range:wifi:2412MHz-2462MHz/2422-2452MHz
Modulation Technique: Wi-Fi, DSSS,OFDM
Voltage: DC 12V
Delay time: 120mS 
Working temperature: -20~+70 ºC  85%RH MAX

Wireless Camera Specs:
Image Sensor:CMOS  1/2.7"
Resolution: 1280(H)*720(V)
Viewing Angle: 150°
Power voltage: 5-12V
IR leds: 9pcs
Waterproof level: IP67
Battery Capacity: 2800mA
Transmission Distance: 164ft/50m in open area
Working Time( IR on): 8h(6h)
Charging time: 4h
External DC power supply:5-24V
Charging current: 500MA@5V
Connector Type: USB
Working temperature: -20~+70 ºC  85%RH MAX

Installation:

Package Componetns: