Keyfob A key fob is a decorative item many people often carry with their keys, on a ring or a chain, to provide a better grip or to make a personal statement.
Fobs vary in size and style. Most common are simple shapes of smooth metal or plastic, often with a message or symbol. A fob may be strictly symbolic, or it may be functional itself. For examples, many fobs are small flashlights, calculators, penknives, store discount cards, bottle openers, or USB flash drives.
Electronic key fobs are used for remote keyless entry systems on motor vehicles.