Quality Service and Warranty Service? – 24 hours online customer service, 2-year replacement warranty and lifetime support. 30 days free return service, if you have any questions or need any help, you can contact our background, our professional customer service will answer you in detail. Quad Video Inputs ?– The monitor can watch 4 channels simultaneously, and you can add an additional 3 cameras to avoid all visual blind spots. Input CH1/CH2/CH3/CH4--, you can watch single image or split screen dual view or quad view. Easy to Install?: Bluetooth wireless digital backup camera and monitor. The backup camera and the camera work together through the wireless bluetooth digital signal, which is very convenient to install and use. You don't need to worry about the wiring and installation between the trailer and truck no longer affecting your trailer. Full HD 1080P Image?- This truck wireless reversing camera is designed with 8 infrared and CCD sensors, supports adding 1-4 cameras, can display up to 1080P high-definition images, even in dark environments, you can still View with a 56-foot field of view. But also built-in recording function and loop recording function. After finishing, automatically delete old files, which is very convenient. You will enjoy perfect parking and driving experience. IP69 waterproof level?Bluetooth reversing camera with the latest sealing technology, 150-degree viewing angle, good peripheral vision, so that everything you see when reversing the car can be clearly covered, providing comprehensive field of view coverage, wireless backup camera with IP69 waterproof level , and can also withstand extreme temperatures from 4°F ~ 149°F. It also has anti-fog function. Super Dual Antenna Stable Signal?-Dual antenna display enhances the original transmission signal, even installed on a 60ft travel trailer, there is no signal interruption at all, upgrade power, gearbox distance, stability, durability Wireless bluetooth backup camera The system has improved by at least 80%. It can send 1080p video to a display with a stronger signal. The signal can reach up to 984 feet in open areas and works at vehicle ranges of up to 320 feet.