Feature:1. USB interface connected, much convenient than serial port or parallel port.2. Supporting PWM stepless speed regulation and gray graving.3. High integration, easy to assemble, good for DIY enthusiast and 3D printer manufactory.4. Off-line Control: supports gcode, txt, tap, nc, ncc, CNC format processing files.5. Support Software: grblcontrol/candle(3 axis), lasergrbl(laser).6. Supports off-line control to operate it without computer.(the off-line controller need to be purchased separately)7. Support Software: grblcontrol/candle(3 axis), lasergrbl.Specification:Features:USB interface connected, much convenient than serial port or parallel port.Supporting PWM stepless speed regulation and gray graving.High integration, easy to assemble, good for DIY enthusiast and 3D printer manufactory.Off-line Control: supports gcode, txt, tap, nc, ncc, CNC format processing files.Support Software: grblcontrol/candle(3 axis), lasergrbl(laser).Supports off-line control to operate it without computer.(the off-line controller need to be purchased separately)Specifications:Power: 150W / 300W (Optional)Material: PCBControl System: GRBLSupport Software: grblcontrol/candle(3 axis), lasergrbl(laser)Support System: windows XP/7/8/10Stepping Motor: 42 step motor (1.3A/0.3Nm/24V)Spindle Motor: 775ER(24V/10000rmp/support PWM0%-100%)Laser: 12V5Amax(1W/2.5W/5.5W/7W/10W/15W)Input: 24V(12-24)Off-line Control: support gcode, txt, tap, nc, ncc, cncPackage Size: 14.5 * 8 * 10.5cm / 5.71 * 3.15 * 4.13in150W:Item Size: 90 * 85 * 25mm /3.54 * 3.35 * 0.79inItem Weight: 138g / 4.87ozPackage Weight: 188g / 6.63oz300W:Item Size: 14.5 * 9 * 4 / 5.71 * 3.54 * 1.57inItem Weight: 210g / 7.41ozPackage Weight: 260g / 9.17ozPackage List:1 * Control Panel1 * Shell1 * USB cablePackage List:1 * Control Panel1 * Shell1 * USB cable