Features: 1.Designed for 24in Monitor: This desktop monitor protector is specially designed for 24 inches(547 x 340mm / 21.5 x 13.4in) PC monitor. 2.Blue Ray Blocking: This screen protector panel can filter out harmful blue ray waves from 380 to 420nm UV. Protecting your eyes, sleeping and skin from the negative effects of overexposure to harmful lights. 3.High Transparency: This PC monitor protector adopts premium acrylic material with high transparency, keeping scratches and dirt away from screen. 4.Hanging Type: This widescreen monitor filter can be easily installed. Peel the protective film away from both sides, then hanging it on monitor. 5.Eyestrain Relief: This PC monitor filter allows you to enjoy digital time without worries of eyestrain, blurred vision and headache. Better sleep quality will be ensured. specification:Item Type: Screen Protector Panel Material: Acrylic Application: For 24 inches(547 x 340mm / 21.5 x 13.4in) PC Monitor Inbuilt Battery of Light: 30mAh Wavelengths Filtration: 380 to 420nm Blue Ray (Beneficial Light Won't be Filtered), 99% UV Blocking PackageList:1 x Screen Protector Panel 1 x Tool Kit 2 x Paster 1 x BlueRayTesting Card 1 x BlueRayLight