Easy and quick installation. Fast heat dissipation, simple and easy to use. CPU Model: Allwinner H3 Number of cores: Quad-core Frequency: 4*-A7 Up to 1.2GHz Memory RAM: 512MB Storage Micro-SD card slot: Micro-SD*1 for external storage up to 128GB Connectivity Ethernet: 10/100M Ethernet Audio Input/Output Port: 5Pin, 2.0mm pin header USB Micro-USB*1: Micro-USB 2.0, OTG & Power input, Type A USB Host: 2.0 Type A*1, 2.54mm pin*2 GPIO Pin Header: 2.54mm pin spacing 36pin. Includes UART, SPI, I2C, IO, etc. Serial Debug Port: 2.54mm pin spacing 4-pin header Audio Input/Output Port: 2.0mm pin spacing 5-pin header LED Power LED(Red)*1 System LED(Green)*1 Other Operating Temperature: -20 to 70 Power Micro-USB DC 5V/2A OS Support FriendlyCore (based on UbuntuCore-16.04) OpenWrt 18.06 Armbian DietPi Lakka Version Linux-4.4- U-boot-2017.11 (The development board bracket is transparent and the color of the protective film on the outside is random, not specified) Due to different batches, there may be differences in the product's appearance and printed text, which do not affect usage. Color: As shown Material: PCB Package Contents: 1 x Motherboard 1 x Heatsink 4 x Screws and nuts 1 x Silicone patch 1 x Acrylic top panel 1 x Acrylic base 4 x M2.5 X 5+6mm single-ended copper post 4 x M3 X 5mm screws 4 x M3 X 6+6mm single-ended copper post 4 x M2.5 X 8mm screws 4 x M2.5 screws 4 x M3 X 30mm double-ended copper post Only the above package contents are included; other products are not. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real thing. The allowed measurement error is +/- 1-3 cm.