The blackout stickers for electronics are crafted to provide optimal light blocking capabilities. They are suitable for use on routers, modems, and other electronic devices with bright indicator lights. These stickers help improve sleep quality by minimizing light pollution in your bedroom, making them an essential accessory for a night's sleep. Features -Color:Black -Material:Coated paper -Size:20.00X10.50X0.10cm/7.86X4.13X0.04in -Effortless installation: these led light dimming stickers are designed for easy application; just peel and stick them on any electronic device -Universal use: ideal for routers, controllers, alarm clocks, and other electronics, these stickers provide a versatile solution for light dimming -dimming: these stickers can dim led lights by 50% to 80% and can be layered for increased dimming, allowing you to the light level -Multiple options: available in various sizes, these stickers can fit a wide range of devices, ensuring you have the right size for every need -Enhanced sleep: by reducing led light brightness, these stickers help create conducive environment for sleep, minimizing nighttime disruptions Package list: 4pcs dimming stickers