LOCK BOX APPLICATION: For indoor and outdoor use; wall mount key safe is best used for key and access card storage; large internal cavity allows secure storage for multiple keys EASE OF USE: Resettable 4 digit combination for keyless convenience, set and reset your combination allowing thousands of personalized combination code options. Simple installation (Mounting Kit included) BUILT TO LAST: Lockable key storage designed for installation to a wall or other fixed object; metal body construction for durability and shutter door to protect combination dials from weather IDEAL FOR SET OF KEYS: Exterior dimensions (H x W x D) 11,9cm x 8,5cm x 3,6cm ; Interior dimensions (H x W x D) 9,2cm x 6,4cm x 3cm EASY TO SECURE AND SHARE YOUR KEYS: Great solution for AirBNB and home rental. Gives easy access to care takers and home workers. Ideal to share keys with your family or roomates 30 YEAR WARRANTY