With the PELT you have everything in one box. In addition to the emergency power supply in case of an emergency, the PELT can also be used to operate programming and deletion functions, and it's incredibly easy: First, the PELT is connected to the door system using the chip key attached to the data cable and a button is pressed. Then the key to be programmed is inserted. Combination codes consisting of a key and keyboard code are now programmed using the keyboard. If a key is lost, it can later be deleted from the locking system using the keyboard code.