Its happen to me too, i bought 7 watt stiker laser, when i used just for 3 days, the beam is reduce like a 1mw , i cant even se the beam line and i think it was broken, i contact sanwulasers , they said have to send back the module, unfortunatelly their address on the site cant be found by hongkongpost and they said unsucesfully delivered, and then i try to contact hongkongpost by email and have to rename the new address of sanwulasers, and it is delivered as well, and then i said not to send me again 7watt blue laser, i want to changed with green or red laser. And then then send red laser module to me, its on the way, and i hope its working well
