Specifications CPURockchip PX3 cortex-A9 Quad-core, 1.6GHz OSAndroid 4.4.4 OS DDR32GB EMMC8GB Bit Sreen7 inch 800*480, Capacitive screen RS232 serial ports3 RS485 (Optional)1 CVBS Input1(default) CVBS Input4(optional) CANBUS (Optional)1 USB ports1 x 2.0 USB OTG Internal/External TF socketMicro SD card / max 128G Byte I/O portinput x 4 & output x 2 line Speaker 2W 8ohm, Size:40mm GPSGPS/BD Module 3G module900 MHz/1800 MHz/1900 MHz/2100MHz WIFI Realtek 8189ES GPS AntennaExternal GSM AntennaExternal Size190*118*25mm Weight2.5kg Main Power10V~32V BatteryNo battery