CM4 card holder: applicable to all versions of Compute Module 4 Connector: M.2 M KEY, supporting communication module or NVME solid state ; for GPIO interface USB: USB 2.0 Type A interface x one Camera: MIPI CSI-2 interface x 1 (15pin 1.0mm FPC connector) Video: -compatible interface x 1. Support 4K 30fps output Storage: onboard -SD card slot (for versions without eMMC) Power input: 5V Size: 73.58 x 53.34mm Material: PCB+metal colour: black Package Contents: 1 x CM4-Duino Expansion board 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.