Both the outside- and inside handle is electrically controlled. Mechanical opening by cylinder is always possible. When door closes, deadbolt is thrown out automatically, latchbolt is blocked and the lock case is secured in two points. EL571 is used especially in situations where the advantages of handle-controlled unlocking have to be combined with the mechanical security requirements. The locks can be electrically controlled by access control system or by a remote control system such as timer, keypad or push button. The integrated monitoring contacts from the lock can be connected to different systems.