BTT BigTreeTech CB1 / BigTreeTech Pi4B Adaptor

CB1 V2.2
> CPU: Allwinner H616, Quad-core Cortex-A53 @ 1.6GHz
> GPU: Mali G31 MP2, support OpenGL3.2
> RAM: 1gb DDR3L SDRAM
> Display: Support HDMI2.0A output, 4K display
> USD: 2.0
> Network Support: 100M Ethernet + 100M WiFi

Pi4B Adaptor V1.0
> Power Input: Type-C 5+-0.25V
> Support: BigTreeTech CD Series, all versions of Raspberry Pi CM4
> Interface: Micro HDMIx2, USB 2.0x4, RJ45, DSI, CSI, Micro SD, etc