1、3 INPUT INTERFACE: With 3.3-12V TTL adjustable power supply, 3 input interfaces design, namely DC12V TTL, 3Pin 2.54 interface and 3pin connector. 2、FIXED FOCAL LENGTH: The laser module is fixed focal length design, just place a 6mm spacer at the bottom and tighten the screw to adjust the focal length. 3、HIGH SPEED FAN: Support to detect temperature and dynamically adjust fan speed, 15000rpm dual ball bearing high speed fan, better heat dissipation. 4、COPPER CORE: Built in 60mm thread copper core, adding heat dissipation silicone grease, safe temperature control, can withstand 48 hours aging test. 5、WIDE APPLICATION: The maximum cutting and engraving depth is up to 5mm, efficient and durable, and it can engrave brushed or mirror stainless steel. Item Type: Laser Module Product Model: F30130 Fan Speed: 15000RPM (Double Ball Bearing) Interface: PH2.0 4Pin Drive Design: Built in Input: 12V 3A Optical Power: 5.5W Diode Number: 1 Light Source: LD C Lens Minimum Focus Size: 0.05 x 0.05mm Temperature Sensing: Yes Power Regulation Method: PWM duty cycle PWM Input: 3.3-12V, 0-20KHz Continuous Work (cw): Unlimited Fan Speed Control: Yes Optical Feedback: Yes Warranty: 2 years (20000 hours) Maximum Cutting and Engraving Depth: Approx. 5mm / 0.2in Cutting Speed (3mm Plywood with Air Assist, Clear Edges): 180mm/min 100% (power from 1pass) Brushed Stainless Steel Engraving: Yes Mirror Stainless Steel Engraving: Yes 1 x Laser Module (Air Assist Kit Color Random) 1 x Hose 1 x Hose Adapter 1 x Interface Adapter Board 3 x Cables 1 x Module General User Manual 1 x Slide Chute 2 x Hex Wrench