360° Full Parking View With Front/Rear/Rig. Ht/Left 4 Cameras DVR&Video Monitoring. Parking monitoring starting voltage must be greater than 12.5V (car batteries generally 13-14V), then the battery power, and a fifth DIP switch to dial up sign Parking REC. This product has a power loss protection, voltage less than 11.5V off automatically enter the sleep […]