1. The onboard standard CM4 connector supports access to CM4 Lite/eMMC series motherboards, which has more performance. Compatible with 4B Size and functions same as much as possible2. Easy interface location compatible with 4B motherboard for raspberry pie3. On board 4-way USB2.0 expansion port, compatible with USB 1.1 transmission4. On board RJ45 Gigabit Ethernet port, 10/100/1000 M adaptive5. On board GPIO audio headphone (capturing GPIO18 and GPIO19)Product name: CM4 to PI4B adapter boardInterfaces: USB * 4, RJ45 * 1, * 1, --compatible * 2, TypeC power * 1, CM4 interface * 1,. SD card slot * 1, Camera and interfaceProduct size: 86 x 56mmcolor:GreenMaterial:PCB+metalPackage Contents:1 x CM4 to PI4B adapter board1 x Screw packageOnly the above package content, other 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.