Cyxus Blue Light UV Filter [Anti Eyestrain] 9H Tempered Glass Screen Protector for Apple iPad 1/2/3/4 (iPad4th/3rd/2nd/1st Generation) Compatible with - Apple iPad 2 / Apple iPad 3 / Apple iPad 4 Anti Blue Light - Blcok the harmful blue light from the screen, relieving eyestrain.Promote healthy melation levels for better sleep. 9H Tempered Glass - Extremely high hardness.Prevent scratches, scrape and crack. Easy to install - One-push super easy installation and bubble free, fingerprint free, dust free. FDA Registered Company - Cyxus is the FDA registered company in USA with CE certification and RoHS certification.