The TEC-A3 Glow Fob is a unique glow-in-the-dark (GITD) keychain fob. 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 aluminum housing with a black anodized finish. Comes with a jump ring and a caribiner key ring. 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! Attach the TEC-A3 to your car keys or even a flashlight, so you can always find them when the lights go out. Attach it to your jacket as a zipper pull, clip it to a backpack, camping gear, or even to the pull chain on a ceiling fan.