Security features: single-walled key cabinet 1.2 mm solid steel Door leaf thickness: 1.2 mm Door with hinges, top and bottom opens with fingerprint - several can be stored Opening possible using external power supply 4 x 1.5 volt AA batteries excl. Fingerprint opening 2;fingerprints with manager function and 8;fingerprints for users can be stored. Fingerprints with manager function can open the Key Pro, save;and delete user fingerprints. Users can open the key cabinet, but cannot save or delete fingerprints. Installation: prepared for wall mounting Accessories: hook rails not adjustable 68 hooks incl. The Rottner Key Pro 68 is the ideal storage place for up to 68 keys, which are neatly and clearly stored on hook rails. The key feature of this key box is the fingerprint opening. Simply touch the small safe and it opens! Misplacing or losing keys, forgetting the code - these are things you no longer have to worry about. If the Key Pro 68 does not open for any reason, an emergency power supply is possible. One touch to the key!