Product name: CM4 expansion board Material: PCB+Metal Model: CM4-IO-BASE-C CM4 deck: suitable for all versions of Compute Module4 Networking: Gigabit Ethernet RJ45 interface color: blue Connector: M.2 M KEY, support communication module or NVME SSD, for 40PIN GPIO interface USB: USB2.0 Type A x 2 Display: LCD interface (40pin 0.5mm FPC connector) Camera: MIPI CSI-2 interface x 2 (15pin 1.0mm FPC connector) Video: -compatible interface, support 4K 30fps output Real Time Clock: real time clock with battery interface and to wake up CM4 Storage: Onboard -SD card slot (for versions without eMMC) Fan interface: adjustable speed, 5V Power input: 5V Size: 85x56mm (for size) Package Contents: 1 x CM4 expansion board 1 x Solid state drive fixing screw 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.