Main Features 2 CH HD Mobile DVR-SD Memory Type HD 720P SD Memory (Up To 64GB) Optional GPS Built-in G-Sensor Low Battery Monitoring (Cut-off Function) WIFI (App) PC Viewer    Specification Specifications Main CPU Davinci Digital Media Processor Up to 1000-Mhz ARM Cortex –A8 RISC Processor 256KB of On-Chip Memory Controller MICOM 16Bit RISC Microcontroller Memory 128MB NAND Flash Memory RAM 256*2(512MB) DDR III RAM Composite NTSC Composite Video Output (3.5mm Jack) Video Input 2ch HD Rear Camera (with Ser-Des) Wi-Fi Interface USB 2.0 Interface SD Card Micro SD Card Socket G-Sensor Tri-Axis Digital Accelerometer Temperature Operation Temperature: 0℃  ~ 60℃ Store Temperature: - 20℃  ~ 80℃ GPS UART Interface GPS RTC Internal Real Time Clock (With Back up Battery) MIC Microphone Port (3.5mm Jack) Speaker Internal Mylar Speaker Status LED Red (Power On/OFF Indicator) Green LED 2ea (Status Indicator ) Key Recode Switch Power On/Off Key GPIO External GPIO Signal Input Port Debug Ethernet & UART Debug Buzzer Beep Sound Buzzer Power Input :DC 10V ~30V Power Consumption : 5W(2CH@30fps)=>LCD off except GPS, network  Dimension  External CAM  Application  Viewer