Storage:-SD Slot: -SD*1 for external storage up to 128GB Connectivity:Ethernet: 10/100M Ethernet Audio:Audio input/output Port: 5Pin, 2.0mm pitch pin header -USB*1:-USB 2.0, OTG & Power In, Type A USB :2.0 Type A*1, 2.54 mm pin*2 model:NEO V1.4 CPU:Allwinner H3,-core,4*-A7 Up to 1.2GHz Memory:256MB GPIO: 2.54mm pitch 36pin. It includes UART, SPI, I2C, IO etc Serial Debug Port: 2.54mm pitch 4-pin-header Audio input/output Port: 2.0mm pitch 5-pin header Power LED(Red)*1 System LED(Green)*1 Others:Working Temperature: -20 to 70 Power:-USB DC 5V/2A OS Support:FriendlyCore(based on UbuntuCore-16.04),OpenWrt 18.06,Armbian,DietPi,Lakka,Kali version:Linux-4.4- PCB:6 Layer Dimension:40 x 40mm Material: PCB+Metal colour: Blue Package Contents: 1 x NEO development board 1 x -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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.