... built-in and external schemes4. Hight light Transmission over 95%5. Explosion-proof,glare-proof6. Aluminum alloy enclosure, strong stability7. Support ... customers' needs;4,Hight light Transmission over 95%;5,Explosion-proof,glare-proof;6,Easy calibration,Easy maintenance.7 ,long life time ... ;10,Support both of inside and outside environment workable. 46" LCD Monitor