... , plug in the interface of network switch.Technical Parameters:ModelTBV-3107-SPower SourceDC12VPower Consumptionless than 5WNetwork ProtocolTCP UDP SIP RTPNetwork Chip ... short-circuit, SD card holder, RJ45, USBDimensions270x165x52mm Combination:Sub-stations TBV-3201A install in the carSub-station TB-3201A install in ... carSub-stations TB-3201C install in the car Main controller TBV-3300