Fangrui Product Details Four-channel Video Input: Left-view, Right-view, Rear-view And Front-view. Each Group Of Video Inputs Has A Dc+12v To Power The Camera. The Output Shares A Video Channel And Outputs A Power Line That Triggers The Screen. Adopt Wireless Remote Control, Mcu Intelligent Circuit Detection And Precise Control. The Product Is Designed With A Power Supply Protection Circuit To Protect The Camera And The Vehicle Circuit. Wide Voltage Power Supply Input Dc8v-16v, Large Truck Dc24v To 12v Power Supply (optional). 360 Panoramic Intelligent Converter Size: 80mm X 35mm X 20mm. Wireless Remote Control Size: 40mm X 10mm Product Description: 4 To 1 Intelligent 360 Panoramic Switcher Is Supposed To Add More Video Inputs For Cameras When Its Connected With Video Interface For Different Car Models. Its Sort Of Diy Solution For Customers With Easy Installation. Supporting Decoders, And Then Use Dvd Or Car Monitors To Solve The Blind Spot On The Car Colour: Black Material: Abs Plastic Packag