Features: With powerful 32 Bit processor . High speed SDcard and support for a secondSD external card if required. Dualextruders on the main board, up to 5 more extruders on the expansion board. Expandableup to 7 extruders with Firmware support for mixing nozzles and remapping axesto use highpower external driver. HighPower rating: Each step driver is capable of 2.8A motor current, currently limited in software to 2.4A. The bed heater channel is specifically designed for high current 18A Specifications: Item Type: Motherboard Model Number: Duet 3 The Large Main Board Size :Approx 14cm/5.51'' long and 13.4cm/5.28'' Wide Weight:330g/0.66lb Material:Metal Package Includes: 1X Duet 3 6HC Board 1X Cable note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand Please allow 0-1cm error due to the manual measurment.