What is Keyfob?

A keychain remote used to arm and disarm a security system with the touch of a button. Keyfob buttons can usually be programmed for many different functions such as system armings and disarmings, panic alarms, and X10 lighting. In apartments and condominiums where there are common areas that many different people need access to, a keyfob can also double as a proximity card that allows authorized access to restricted areas.