The Nite Ize NextGlo Key ID Tag Assorted are perfect for visibility and identification with photoluminescent technology that allows maximum glowing in a variety of colors. The high-performing, long-persistence glow charges in minutes and lasts for hours. With the ability to be charged from any light source, including both natural and artificial sources, NextGlo Key ID Tags make it easy to find and identify your keys whether they are at the bottom of your backpack or on a table at the campsite. By incorporating NextGlo into durable write-on tags, you can use a permanent marker to identify your tags and know that they will be readable day or night. These Key ID Tags easily attach and detach using the included S-Biner MicroLocks.