ERB is a 3D printer multi-color control board based on RP2040, mainly used in Enraged project. It can also be used in other two-axis stepper motor control situations. Different batches may have different silk screen printing/batch numbers/appearances, but will not affect the use V2: Add CANBUS interface Add 20x30 heat sinks Replace with a 4Pin connector, which can be quickly plugged in and xout, for Power & USB/CAN. Add optional USB and CANBUS interfaces Add status indicator for bootloader or status indication. Preset thermistor temperature measurement circuit 12 x IO for gate sensors/switch Onboard integrated heat sink More : https://github.com//-ERB Colour:Black Material:PCB+Plastic Package Contents: 1x motherboard 1x USB cable 1set x accessories (accessory colors are random,don't accept the specified color) 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.