Digital Wireless Rear View Backup Reverse Camera System, 9" Wireless Split LCD Monitor with Two Wireless Waterproof Ir Color Cameras for Excavator, Cement Truck, Farm Tractor, Trailer, 5th Wheel, Rv Camper, Heavy Truck 9" DIGITAL WIRELESS LCD MONITOR, FULL/SPLIT SCREEN TWO DIGITAL WIRELESS WATERPROOF COLOR CAMERAS WITH NIGHT VISION WIRELESS RANGE: 70-80 METERS IN FREE SIGHT POWER INPUT: DC11-32V WIRELESS SIGNAL ONLY, NO BATTERY INSIDE CAMERAS AND MONITOR, SHOULD BE CONNECTED TO POWER SOURCE