Product name: CM4 Expansion Board Model: CM4-IO-BASE-B Compatible with all versions of Compute Module 4 Networking: Gigabit Ethernet RJ45 interface Connector: M.2 M KEY, supports communication module or NVMe SSD, 40-pin GPIO interface USB: 2 x USB 2.0 Type A Display: LCD interface (40-pin 0.5mm FPC connector) Camera: 2 x MIPI interface (15-pin 1.0mm FPC connector) Video: Compatible interface, supports 4K 30fps output Real Time Clock: Real time clock with battery interface, capable of waking up CM4 Storage: Onboard Micro-SD card slot (for versions without eMMC) Fan interface: Adjustable speed, 5V Power input: 5V Size: 85 x 56mm Note: Product appearance, color, and printed text may vary slightly by batch; these variations do not affect functionality. Material: PCB Color: Blue Package Contents: 1 x CM4 Expansion Board Note: Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3cm.