1.CCTV mini portable car dvr 2.1/2/4 CH optional 3. support GPS, ... Storage: SD card 5. Small Size CCTV Small GPS WIFI Car DVR : ELP-MDR504S Specifications:Power In: 12V DC. Power Out ... 0Vp-p,75Ω,CVBS or LCD. Video Standard:PAL/ NTSC. Audio Input:2 channels(Stereo),Line In,50~400mv,50Hz~3500Hz ... . Audio Out: 1 channel. Compression: Advanced H.264(High/main/ ...