The CPU is upgraded to BCM2711, quad-core A72 64-bit processor, with more powerful performance. More memory (1GB/2GB/4GB/8GB), suitable for large-scale data compilation. Faster eMMC flash memory with a transfer rate of up to 100MB/s, which is 4 times faster than CM3+. Add a wireless module, using the same WiFi and Bluetooth modules as Pi4B, providing built-in PCB antennas and external antennas, which are more suitable for industrial applications. Uses a B to B connector design, changing the gold finger design from previous CM series and improving stability. Increase built-in 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: //FAN/-compatible/USB/RJ45 Gigabit Ethernet/Micro-sd card/M.2 Working Voltage: 5V Power Supply Current: 3A Purpose: dedicated base plate for computing module Color: Blue Material: PCB+metal Size: 85 x 56mm Package Contents: 1 x CM4 expansion board 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 to be a little different from the real thing. The measurement allowed error is +/- 1-3 cm.