Features: for Raspberry CM4 duino expansion board supports arduino ecology CM4 socket: for all versions of Compute Module 4 Storage support onboard Micro-SD card slot (for versions without eMMC) Connect to compute module 4 motherboard standard onboard CM4 connector supports access to compute Module 4Lite /eMMC series motherboards Interface: USB 2.0 Type A interface X1; HDMI-compatible interface X1, supports 4K 30fps output; MIPI CSI-2 interface X1. Specifications: Connector: M.2 M-KEY, support communication module or NVME SSD for Arduino GPIO interface USB: USB 2.0 Type A interface X1 CM4 socket: for all versions of Compute Module 4 Camera: MIPI CSI-2 interface X 1 (15pin 1.0mm FPC connector) Video: HDMI-compatible interface X1, supports 4K 30fps output Power input: 5V Size: approx 73.58 x 53.34mm /2.9x2.1in Material: PCB- Color: Black Note: Only the above package content, other products are not included. Note: Light shooting 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. Package includes: 1 x Expansion Board