This 405nm laser module is an industrial electronic component and used for as Electric tools, Level rule, Locator, Range finder, Rotating laser, and other measuring tools. Not a handheld laser.
The 405nm laser module is precise instrument. Before carrying on some laser DIY activities, please read about the technical information first and protect your eyes before laser ray. You must know the possible hazard when doing test, experiment or laser DIY.
Specification: Model: 405MD-100-F-LX Output Power: 100mw Wavelength: 405nm Working Voltage: 3-5VDC Working Current 200mA Material Metal Lens Glass Laser Shape Dot Focusable YES Preheating Time NO Dimensions ø 18.0*45.0mm