... 4.Industrial level quality 5.CE,ROHS 1pcs Adjustable focus function 405nm 20mw blue violet laser module laser diode ... 's requirement) Warm-up timeless than 5 seconds Specificationsfixed focus, the expected lifetime is more than 8000 hours Main ... laser medical equipment, stage lighting and laser targeting devices ,Machine vision , Laser Alignment , Laser Positioning Surveying Instrument, Laser Sight and ...