Specifications CPU Rockchip PX3 cortex-A9 Quad-core, 1.6GHz OS Android 4.4.4 OS DDR3 2GB EMMC 8GB Bit Sreen 7 inch 800*480, Capacitive screen RS232 serial ports 3 RS485 (Optional) 1 CVBS Input 1(default) CVBS Input 4(optional) CANBUS (Optional) 1 USB ports 1 x 2.0 USB OTG Internal/External TF socket Micro SD card / max 128G Byte I/O port input x 4 & output x 2 line Speaker 2W 8ohm, Size:40mm GPS GPS/BD Module 3G module 900 MHz/1800 MHz/1900 MHz/2100MHz WIFI Realtek 8189ES GPS Antenna External GSM Antenna External Size 190*118*25mm Weight 2.5kg Main Power 10V~32V Battery No battery