The TEC Titanium Glow Fob by TEC Accessories is a glow-in-the-dark keychain fob that allows you to see your keys in the darkest of lighting conditions. The internal glow pellet consists of a clear acrylic tube filled with a special glow powder and resin mixture. The pellet is mounted inside a protective titanium housing. When exposed to light, it will glow for hours...the longer the exposure time and the higher the light intensity, the longer and brighter it will glow. Glow times can last as long as 12 hours.