Our light blocking stickers are for reducing the brightness of LED various electronic devices. They are easy to apply and remove, leaving no residue behind. These stickers are particularly useful in bedrooms, offices, and living rooms, where excessive light can be a nuisance. Enhance your space with these practical and stylish stickers. Features -Color:Black -Material:Coated paper -Size:20.00X10.50X0.10cm/7.86X4.13X0.04in -Simple application: these light dimming stickers are easy to apply; just peel and stick them on any for immediate dimming -Wide compatibility: suitable for use on routers, controllers, alarm clocks, and other electronic devices, these stickers offer a versatile light dimming solution -Effective dimming: capable of reducing led light brightness by 50% to 80%, these stickers can be layered to achieve the desired level of dimming -Variety of sizes: with multiple sizes available, these stickers can accommodate different devices, ensuring a fit for all your electronics -Improved sleep quality: by dimming led lights, these stickers help create a darker environment, making it easier to fall asleep and stay asleep Package list: 4pcs dimming stickers