Keychain Light

A keychain light is a small, lightweight flashlight that is designed to be attached to a keychain. It is typically powered by a small battery and is used to provide illumination in dark areas. Keychain lights are often used to help find keys in the dark, to light up a lock, or to provide a small amount of light in an emergency. They are also popular as promotional items and can be found in a variety of shapes, sizes, and colors.