3v-5V 445nm-450nm 500mw Blue Ray Focusable Laser Module Diode Focusable

3-5V 445nm-450nm 500mw Blue Ray Focusable Adjustable Laser Dot Module w/ Driver in This 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 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. Note: The modules are tested and the output power are measured by laser power meter before sending out. Please don't compare the power of this one with a none-measured laser. If you doubt the output, please have the laser you recieved checked by laser power meter. If there is any problem, please feel free to contact us. We will solve the problem asap. Please carefully read this statement before buying this item.This is an industrial-use/stage lighting electronic component or replacement part for laser machine or device, like laser engraving machine,laser marker, cosmetic equipment, research or labotory apparatus etc.. This item is only intended for use only by professionals, trained operators, laser manufacturers or other qualified users.Any individual or company who buy this item to build or produce laser product, please be sure your products are in compliance with FDA regulations:21CFR1040.10.