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Input voltage: (12-36V) Stepper motor drive: A4988 Connection: USB (USB-CH340) Master chip: atmel 328P (arduino nano) Power interface: 5.5-2.5mm DC interface Software: GRBL controller, UniversalGcodeSender Feature Support Laser engraving. Support spindle PWM speed control. Support XYZ triaxial control, spindle, laser head . Spindle drive chip 1: MOSFET (recommended input voltage within 12-36V, current 10A) .Can be connected to high-power spindle motor or laser head. Spindle drive chip 2: MOSFET (current maximum 2A !!) .Can only be connected within the 2A head of the laser, the voltage 0-12V can be adjustable. Package: 1 x 3 Axis control board (without offline controller ) 1 x USB line 3 x Motor line