Car reaview mirror monitor Screen Size:5'' Voltage:DC 12V USB/SD/Bluetooth,FM ... :300:1System:PAL/NTSC (AUTO)Input / Output:1 "video input (Video Rearview System)Main Function:GPS navigation,Monitor,Reversing rearview, Bluetooth,USB ... /SD/MP5,FM Transmitter OS-518 Hot selling 5''car rearview mirror gps ...