... and wifi 3G DV 4 ch Bus security system with 3g ,GPS,wifi ,G-sensor Features audio/video compression ... 2CH of CIFfps: 1 to 25f/s/ch adjustable (PAL) or 30f/s/ch (NTSC) Video Quality1-4 levels, 1 ... TD-SCDMA, EVDO,HSPA+ and WIFIG-SensorBuilt-in G-Sensor moduleOthersPower ManagementSystem auto power on/off modeVehicle acc ... Back View: 1.1. Front Panel Definitions 4 ch Bus security system with 3g ,GPS,wifi ...