1This is a 5.5W laser module that could give out 450nm blue laser light 2Large heat sinks and cooling fan ensure better heat dissipation during work 3Support continuous light output working mode and can work for long time 4This module comes with power adapter for convenient use 5Suitable for industrial laser engraving machine equipment, great for DIY laser engravers Features:This is a 5.5W laser module that could give out 450nm blue laser light. Large heat sinks and cooling fan ensure better heat dissipation during work.Support continuous light output working mode and can work for long time. This module comes with power adapter for convenient use. Suitable forindustriallaser engraving machineequipment, great for DIY laser engravers.Specifications:Laser Wavelength: 450nm (blue)Output Power: 5.5W Power Supply Voltage: 12VDCDriving Mode: External ACC constant current driveAC Adaptor Plug: USAC Adaptor Input Voltage: 100-240VLens Material: Optical glass with coatingLight Form: Dot, adjustable-focus Modulation: TTLPWM Control: SupportNote: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 please.Package Includes:1 x Laser Module1 x AC Adaptor with US plug