H.264 HDD mobile DVR(up to 1TB) Rugged mobile dvr GPS,3G,WIFI,G-sensor support 6CH alarm,UPS... etc Mobile CCTV CMS ... /output4-channel input, 1-channel output; 1.0Vp-p, 75ΩDual streamSupportOSDTime & date, vehicle ID, GPS info, etc.compression H.264 Video ... rate optionalHD1: 600Kbps ~ 2 Mbps, 8 levels of bit rate optionalD1: 800Kbps ~ 3Mbps, 8 levels of bit rate optionalAudioInput/outpu4ch audio ...