Features: brand new and high quality GRBL1.1f firmware, stable performance, full offline engraving (optional offline module), offline tool setting and engraving Support limit switch, knife setting, steering gear, cooling fan and other functions, support 2P/3P laser, support PWM/TTL signal control, power 0- adjustable The spindle supports PWM power 0- adjustable Stepper motor over-current for protection to avoid damage, upgrade A4988 driver, stable and reliable performance Laser-directly imports pictures and engraves, no programming, no design, simple and convenient Specifications: Material:ABS Size:Approx.10x4x2cm/3.94x1.57x0.79inches Color:Black Type:1 inch Offline Screen/3.1 Control Panel/1.8 inch Offline Screen Rated input power: 100 (for W) No-load speed: 10000 (rpm) Plunger stroke length: 45 (mm) Diameter of bottom plate: 12 (mm) Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set 3-axis Control Board