User Manual: http://m5.img.dxcdn.com/CDDriver/CD/sku.256694.pdf Brand N/A Model XY-3026 Quantity 1 piece(s) Color Black Material ABS Function Car Front And Rear View Camera Control Box System Switch Power Supply Max: 50mA DC 12V Other Features Working Power: Max: 50mA DC 12V; System signal: PAL / NTSC; Video output: 1.0VPP / 75 ohm; Working temperature: -20~80 centigrade; Specially used for rearview camera; Rearview camera priority AV2 AV3 Automatic switching by + 12V DC trigger wire; Return to AV1 video after triggering; 3-way video input 1-way video output; The best solution for solving no automatic video switching problems; Easy to install: all you need to do is to connect the original video cable to this device and connect trigger wires Packing List 1 x Power box (300cm-cable) 1 x Switch (200cm-cable) 1 x English user manual