The keypad is fastened directly to the lock underneath, the 7cm long cable that enables easy installation.
The built-in lithium battery guarantees a maximum life-span of 10 years. It can be expected to lat 5 years with everyday use. The battery is checked during the opening process and when the battery is running low the lock will remain open, an alarm will go off and the lock cannot be used again.
There is a master code on the rear-side of the lock (screwed in place and therefore not visible).