1、This is a 1.6W laser module that could give out 445nm blue laser light. 2、Heat sinks and cooling fan ensure better heat dissipation during work. 3、With TTL and PWM functions, TTL can control the switch and PWM can control the power. 4、Support continuous laser output working mode and can work for a long time. 5、Dedicated high power blue laser module for laser engravers. Features: This is a 1.6W laser module that could give out 445nm blue laser light. Heat sinks and cooling fan ensure better heat dissipation during work. With TTL and PWM functions, TTL can control the switch and PWM can control the power. Support continuous laser output working mode and can work for a long time. Dedicated high power blue laser module for laser engravers. Specification: Laser wavelength: 445nm (blue) Optical power: 1.6W Focus: Adjustable Drive method: ACC constant current drive Cooling method: Forced air cooling Power supply port: 2*2.54 Control port: 2*2.54 Module material: Copper Lens material: Optical coated glass Shell material: Aluminum (anodized black surface) Module size: 8.2*3.3*3.3 cm / 3.2*1.3*1.3in Weight: Approx. 304g/10.7oz Package list: 1 * Laser Module 1 * MX37 Cable Note: 1. Please wear laser goggles during usage, avoid to touch the laser directly to the eyes and skin. 2. The laser module should works less than half an hour in one time, and continue to work when it cool down. 3. Please kindly make a note if you need any plug adapter.