2 Pin 1.27/1.25mm RTC battery input connector for low power RTC IC HYM8563TS MASK button for eMMC update,one 5V Fan connector Power supply: USB-C, support PD, 5V/9V/12V input PCB: 8 Layer Ambient Operating Temperature: 0℃ to 70℃ SoC: Rockchip RK3568B2 CPU: Quad-core ARM Cortex-A55 CPU, up to 2.0GHz GPU: Mali-G52 1-Core-2EE, supports OpenGL ES 1.1, 2.0, and 3.2, Vulkan 1.0 and 1.1, OpenCL 2.0 Full Profile. VPU: 4KP60 H.265/H.264/VP9 video decoder, 1080P60 H.264/H.265 video encoder NPU: Support 0.8T RAM: 4GB LPDDR4X Flash: 32GB eMMC Ethernet: one Native Gigabit Ethernet, and two PCIe 2.5Gbps Ethernet USB: two USB 3.0 Type-A ports HDMI-Compatible: support HDMI-Compatible 1.4 and HDMI-Compatible 2.0 operation support up to 10 bits Deep Color modes support up to 1080p@120Hz and 4096x2304@60Hz support 3-D video formats PCIe: M.2 Key M, PCIe2.1 x1, support NVME, PCIe WiFi etc For SD: support UHS-I GPIO: 12-pin 0.5mm FPC connector up to 1x SPI, up to 3x UARTs, up to 4x PWMs, up to 8x GPIOs For SD/MMC/SDIO/I2S: 2x8-pin 1.27mm connector Compatible with SDIO3.0 protocol Compatible with SD3.0, MMC ver4.51 4bits data bus widths 1x I2S with 2x SDO and 3x SDI Debug: one Debug UART, 3 Pin 2.54mm header, 3.3V level, 1500000bps LEDs: 4 x GPIO Controlled LEDs (SYS, WAN, LAN1, LAN2) Colour:Blue Material:ABS Specification：A Package Contents: 1x Development Board Specification：B Package Contents: 1x Complete machine 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.