1. The CPU is upgraded to BCM2711, quad-core Cortex A72 64-bit processor, with more powerful performance 2. More memory options (1GB/2GB/4GB/8GB), suitable for large-scale data compilation 3. Higher-speed eMMC flash memory with a transfer rate of up to 100MB/s, which is 4 times faster than CM3+ 4. Add wireless module options, use the same WiFi and Bluetooth modules as Pi4B, provide on-board PCB antennas and external antennas, which are more suitable for industrial applications. Adopt B to B connector design, change the gold finger design of previous generations of CM series, and enhance stability 5. Increase on-board Gigabit Ethernet design, support IEEE1588, suitable for network application development. Add PCle interface extension, which can flexibly add related modules Product name: Expansion board Model: CM4-IO-BASE-A Chip: BCM2711 Interface: CSI/DSI/FAN/HDMI-compatible/USB/RJ45 Gigabit Ethernet/Micro-sd card/M.2 Working voltage: 5V Power supply current: 3A Purpose: dedicated base plate for computing module colour:Blue Material:PCB+metal size:85 x 56mm Package Contents: 2 x CM4 expansion board Only the above package content, other products are not included. Note: Light shooting 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.