Offline engineering: GRBL1.1f firmware is adopted, with stable performance. Optional offline module to realize offline tool setting and engraving. Directly enter the picture for engraving, without programming and design, simple and convenientAdjustable power: PWM or TTL signal control is supported, and the power is adjustable between 0-100%. The spindle supports 0-100% adjustable PWM power. Enhanced spindle drive can support 20000rpm spindleStable overcurrent protection: provide overcurrent protection for stepper motor to avoid damage, upgrade integrated stepper motor drive, 2A high current, high stability. Add power button switchGood heat dissipation: professional shell protection, fan active heat dissipation, will not heat for a long time. Add fan ports to force cooling, add enclosures to protect the control panel during transportation and avoid short circuit problems during useShort circuit protection function: cancel module, use the integrated stepper motor to drive, with short circuit protection, integrated heat dissipation aluminum alloyColour:blackMaterial:pcbPackage Contents:1 x CNC Control BoardOnly 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.