Auto-Vox Digital Wireless Backup Camera System with 7" HD Rearview Monitor, Sony CCD Super Night Vision camera IP 68 Waterproof Rear view camera for Trucks Digital Wireless transmitter takes the place of complicated cable wiring and provides stable signals without any interference within 30m. 7" Full-color LCD rearview monitor with built-in speaker and remote control.Two video inputs,one audio input and optional PAL&NTSC TV system. 18 IR lamps 1/3-inch color SONY CCD camera with 120 degrees lens angle and 8M night vision range gives you safer driving experience in the day/night. Suitable for most gigantic vehicles, such as Excavator, Cement Truck, Farm Tractor, Trailer&RV, Heavy Truck, School Bus. AUTO-VOX MW3 is designed only for reversing. It mainly avoids blind spots when parking and can not be used as driving monitor at highway.