1、Perfect safety protection, including surge protection and overvoltage protection. 2、Suitable for NEJE Master series laser engraving machine. 3、An ideal replacement for the old or broken laser head, convenient to use. 4、Adopt copper and aluminum material, good heat dissipation performance. 5、Wavelength for 450nm, and the laser head supports PWM adjustable power. 1 x Module1 x 4-pin Motion Cable1 x 3-pin Cable1 x 2-pin Cable1 x Interface Adapter Board2 x Screws 2 x ABS Gaskets1 x L-shaped Wrench Item Type: Laser headInterface: 4pin PH 2.0 (Red: 12V, Black: GND, Yellow: PWM, Green: Temperature signal)Wavelength: 450nmHeatsink Size: Approx.30x80mm/ 1.2x 3.1inMaterial: Copper + AluminumDrive Position: Built-inAdjustable Power: PWM adjustableDrive Protection: Surge protection, overvoltage protectionInput Power: Approx. 12V 2A (not include fan power)Control Line Installation Method: PluggableFan Size: Approx. 30x10mm/ 1.2x 0.4inFan Speed: 15,000 rpmControllable Temperature: Less than 60℃Focus Range: Approx. 5-50mm/ 0.2-2inBest Focal Length: Approx. 10mm/ 0.4in from the light exitRecommended Machine: For NEJE Master Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.