All our locks are stand alone devices with thier own internal power source. They require no external power source or wiring. Fitting our locks is straight forward and is no different to fitting a traditional mortise lock. All locks come complete with operating and fitting instructions along with drilling templates. It is possible to fit our locks yourself if you are comptant at diy. However for best results we recommend you employ the services of a locksmith or carpenter. When ordering a lock you must satisfy yourself that the lock configuration is correct and that the door is suitable to house the lock.