AHD 720P SD Card Mobile DVR Main Features H 264 compression mode support 4CH realtime 720P AHD input and Analog camera input Optional VGA output 8V 36V self adaption wide voltage input super low power dissipation SD card storage Support 2 SD card max 256GB can protect data from shock and dust Support GPS BD G Sensor module extend Optional single serial interface or RS485 extend High reliability aviation connector high cost performance reliable and stable Technical Parameters Function Parameters System Language Chinese English Russian Operation interface OSD menu Password security User password and Administrator password Video Video input 4CH Video input aviation connector Video output 1CH composite video output support VGA AV BNC Video display 1ch full screen 4ch split screen Signal system PAL 100 fps CCIR 625tvl 50 field NTSC 120 fps CCIR 525tvl 60 field Image compression H 264 Main profile Audio Audio input 4CH aviation connector Audio output 1CH aviation connector Compression format G 726 Recording Storage Image resolution 720P D1 HD1 CIF optional Video coding ISO14496 10 Video bit rate CIF 256Kbps 1 5Mbps multilevel image quality optional HD1 600Kbps 2 5Mbps multilevel image quality optional D1 800Kbps 3Mbps multilevel image quality optional 720P 1000Kbps 6Mbps multilevel image quality optional 4 video quality grades highest grade 1 and lowest grade 8 Audio bitrate 5KB s Storage 2 SD card slots each max support 256GB loop recording auto data overwrite Alarm Alarm input 8CH alarm input Alarm output 2CH DO Communication ports RS232 2 RS232 RS485 1 RS485 RJ45 network 1 RJ45 support IP camera Wireless communication SIM card slot 1 SIM card slot 3G Built in 3G module WCDMA EVDO TD SCDMA 4G Built in 4G module TD LTE FDD LTE Wifi Built in Wifi 2 4G 5 8G GPS Built in GPS module realtime geographic coordinates speed information G Sensor Built in G sensor Software PC playback Video playback and analysis by PC client CMSV6 Wireless realtime video audio monitoring positioning alarms etc Software upgrade Support SD card memory upgrade Electric parameters Input voltage DC 8V 36V Output voltage 12V 2 5A 5V 2 5A Video input resistance 1 0vp p 75 Video output voltage 1 0vp p 75 I O port High level alarm 5 24V Low level alarm 3V Operation temperature 20 to 70 Dimension 170mm 140mm 60mm