Keyless entry devices allow keyless entry through a doorway. They help keep buildings and areas secure and eliminate the risk of lost keys and the associated costs of rekeying traditional keyed locksets. Mechanical access control locks do not require batteries, a computer, or software to operate. Electronic access control locks require no wiring to install. Access control phone systems allows building occupants to control entry to the building using an ordinary phone line. Keyless access control keypads are compatible with a variety of electronic locking systems.