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:As Shown Material:PC Package Contents: 1 x NanoPi DUO2 Development Board Kit(The words on the product due to different product batches, but it not affect the use) 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.