Since the Compute Module 3 (CM3) module is in short supply, an adapter board, so the CM4 module can be used as a CM3 interface The for Compute Module 4 (CM4) module is a product based on the performance of for Model B, but its small form factor is very suitable for embedding in products or projects that do not have a large number of classic for . For deeply embedded applications, you can get all the computing power of for in a compact form. CM4 to CM3 Adapter, for computing module CM4-CM3 adapter board, this adapter board is to convert the latest for computing module CM4 to CM3 interface, allowing CM4 to adapt to the old CM3+/CM3/CM3L series baseboard. CM4 uses the same quad-core ARM -A72 processor, dual video output, Gigabit Ethernet, UART, I2C, SPI, I2S and some PWM. Note: Not Included CM4 Motherboard Type: Cable Adapter Name: Computing Module Adapter Board Model: For color:Blue Material:PCB size:67.6 x 45.5MM Package Contents: 1 x CM4 To CM3 Adapter Only the above package content, other products are not included. Note: Light 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.