CPU: for Allwinner H3, Quad-core Cortex-A7 Up to 1.2GHz DDR3 RAM: 256MB/512MB DDR3 RAM For SD Slot x 1 MicroUSB: OTG and input GPIO: two 2.54mm spacing 12x2pin header, one 2.54mm spacing 10x2pin header color: blue Material: PCB Connectivity: 10/100M Ethernet USB x3(included in 2.54mm pitch pin header) Debug Serial Port(4Pin, included in 2.54mm pitch pin header ) Audio input/output Port(4Pin, included in 2.54mm pitch pin header ) GPIO:It includes UART, SPI, I2C, IO etc PC Size: 40 x 40mm Supply: DC 5V/2A Temperature measuring range: -20 to 70 OS/Software: U-boot, Ubuntu-Core and Android Package Contents: 1 x Development Board 1 x Heat Sink 1 x Silicone sticker 4 x Screw Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.