Waveshare CM4-IO-BASE-C Expansion Board for Raspberry Pi CM4 Basic Expansion Board Advanced Version RJ45+M2 M KEY F Product name: CM4 expansion board_x000D_ Model: CM4-IO-BASE-C_x000D_ CM4 deck: suitable for all versions of Compute Module4_x000D_ Networking: Gigabit Ethernet RJ45 interface_x000D_ Connector: M.2 M KEY, support communication module or NVME SSD, for Raspberry Pi 40PIN GPIO interface_x000D_ _x000D_ USB: USB2.0 Type A x 2_x000D_ Display: LCD interface (40pin 0.5mm FPC connector)_x000D_ Camera: MIPI CSI-2 interface x 2 (15pin 1.0mm FPC connector)_x000D_ Video: HDMI-compatible interface, support 4K 30fps output_x000D_ Real Time Clock: RTC real time clock with battery interface and ability to wake up CM4_x000D_ Storage: Onboard Micro-SD card slot (for versions without eMMC)_x000D_ Fan interface: adjustable speed, 5V_x000D_ Power input: 5V_x000D_ Size: 85 x 56mm (for Raspberry Pi size)_x000D_ Depending on the batch, there may be differences in product appearance, color, and printed text, which will not affect use._x000D_ Material: PCB_x000D_ colour: blue_x000D_ _x000D_ Package Contents:_x000D_ 1 x CM4 expansion board_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ 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. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_