Description: Working voltage: 12V Master IC: ATMEL's ATMEGA1284P-AU FT232RL USB interface Integrated 4 A4988 stepper motor drive The hot bed MK1, MK2a, MK2b, MK3 can be controlled Integrated G code file for Mini SD card slot Integrated 3 MOSFET driver hot ends, hot beds and fans Specification: Material: plastic + metal Size: about 208mm. Width: about 50mm height: about 20mm Scope: 3D printer Package Includes: 1x motherboard 1x USB cable