The EZ-Lock IP55 External Key Pad for Lock Control from ESP is a programmable door access control unit featuring a durable construction and modern aesthetics makes it a perfect addition to any access control system. Operation Users approach the keypad and enter a four digit code to activate one of the EZ-LOCKs on board relays. These relays are used to carry power from a 12vdc power supply to an appropriate door release. The EZ-LOCK can be used to operate two separate electronic locks. In addition 2 user groups can be setup allowing specific area access. EZ-LOCK can also be used as a door bell for visitors. Programming Programming the system is kept as simple as possible, all functions are carried out at the keypad itself, the unit is totally self-contained, no PC or laptop required. Installation EZ-LOCK can be installed as a new stand-alone access control system simply by adding a 12vdc power supply and suitable door release or it can be used to upgrade an existing system