1、24in Blue Light Screen Protector: Computer screen protector effectively filters harmful blue light waves between 380‑420nm, protecting eyes, sleep, and skin from negative effects of overexposure. Also filters 99% of harmful UV rays for HEV guard. 2、High Transparency: The 24 inch blue light screen protector is made of acrylic. It can effectively prevent screen from dust, fingerprint and scratches. Suitable for office, home OL, gamer and programmer. 3、Reduce Eye Fatigue: Enjoy digital time without worrying about eye strain, blurred vision, and headaches. Provides better sleep, blocks blue light for eye health, and offers overall health. 4、Easy Installation and No Bubble: Easy to install, just remove the film on each side and hang on the screen. No glue, no bubbles. It can effectively improving your work and kid's learning. 5、Fingerprint Oil Resistant: Computer screen protector equipped with a hydrophobic and oleophobic coating to better repel oil, making fingerprints, dust, and oil easy to wipe away. Item Type: Desktop PC UV Blocking Filter Material: Acrylic Size: 24 Inch Product Size: Approx. 547x320mm / 21.5x12.6in Lamp Built in Lithium Polymer Battery: 30mAh Battery Filter Wavelength: 380-420nm Blue Light (No Filtering Beneficial Light), 99% UV Guard 1 x Desktop PC UV Blocking Filter 1 x Cleaning Cloth 3 x Snap Fastener 1 x Blue Light Test Card 1 x Blue Light Lamp 4 x Protective Case