CPU: Allwinner H3, Quad-core -A7 Up to 1.2GHz DDR3 RAM: 512M Connectivity: 10/100M Ethernet WiFi: 802.11b/g Bluetooth: Bluetooth V4.0 of 1, 2 and 3 Mbps. Camera: OV5640 Key: GPIO Key USB Host: 2.54mm pin x2, exposed in 2.54mm pitch pin header Micro-SD Slot x 1 Micro-USB: OTG and power input Debug Serial Interface: exposed in 2.54mm pitch pin header Audio input/output Interface: exposed in 2.54mm pitch pin header GPIO1: 2.54mm spacing 16pin. It includes UART, SPI, I2C, Audio etc GPIO2: 2.54mm spacing 16pin. It includes USB,10/100M Ethernet, IO etc PCB Dimension: 25.4 x 55mm Power Supply: DC 5V/2A Temperature measuring range: -40 to 80 OS/Software: U-boot,Linux 4.11.2 (mainline) , 16.04.2 (Xenial) Colour:black Material:PCB+metal Package Contents: 1 x Nano pi Duo2 Development Board 2 x 16pin single-row pin header 1 x Antenna 1 x Micro-USB cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.