1. The PI4B Adapter has the same and interface as the for 4B. When used with CM4, the effect is with that of for 4B. 2,1000M Ethernet interface to realize high-speed networking of equipment 3,Dual --compatible interface, external -compatible screen, high-definition sound quality, high-definition quality output 4. 4*USB2.0 ports are reserved for USB ports, which can be connected to the mouse and keyboard. 5. The PI4B Adapter can be matched with CB1 (excluding CB1), and performance is to that of the 3B for raspberry pie. It can also be matched with the motherboard to run the Linux system smoothly, meeting the needs of low-cost Klipper. Product name: CM4 to Pi4B expansion board Power input: Type-C5 0.25V Supported module types: for CB series, for raspberry pie CM4 modules of versions Interface support: --compatible x2, USB 2.0x4, RJ45, CSI, , -SD, etc Product size: 85x56mm Colour:black Material:PCB+metal Package Contents: 1 x CM4 to Pi4B 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.