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: 1.6WFocus: AdjustableDrive method: ACC constant current driveCooling method: Forced air coolingWorking voltage: 12VDCPower supply port: 2*2.54Control port: 2*2.54Power adapter plug: USAdapter input voltage: 100-240VACModule material: CopperLens material: Optical coated glassShell material: Aluminum (anodized black surface)Module size: 8.2*3.3*3.3 cm / 3.2*1.3*1.3inWeight: Approx. 304g/10.7ozPackage list:1 * Laser Module1 * Power Adapter with US Plug1 * MX37 CableNote: 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.