... .SPECIFICATION ITEMMDR5015MDR5025MDR5045VIDEOVIDEO INPUT1 channel2 channels4 channelsVIDEO OUTPUT1 channel, 1.0V, p-p, 75Ω, BNCVIDEO FORMATSupport PAL/NTSCVIDEO ... stick or hard drive)FILE FORMATAVIINTERFACESENSORS1 speed sensor, 1 ignition sensor, 3 sensors for brake, return etc ... .COM PORT 2 RS232 port, 1 RS485 portNETWORKRJ45, 10M/100M EthernetGPSSupport GPS receiver(optional), ...