Make sure that unwanted intruders can't gain access to your home or business by installing a lock only authorized people can get past. The Fingerprint Door Lock uses your unique fingerprint to release its lockset, so only the fingerprints programmed into the lock will ever be able to release it. This flexible lock also offers keypad entry and includes two mechanical keys for emergency entry. The Fingerprint Door Lock runs on four AA batteries, sold separately. What's Included # Interior lock handle # Exterior lock handle # 2 rubber assembly protectors # Lock assembly # 2 keys # Plate # Lock hook # Spanner # 6 screws # Template # Manual There's no need to drill additional holes into your door: The Fingerprint Keypad Lock installs easily in the existing lock hole. Unlike many biometric locks, the Fingerprint Door Lock is weatherproof, so it can be used on exterior doors. Up to 78 fingerprints can be programmed into the Fingerprint Door Lock's memory, and fingerprints can be removed at any time. You can also program 78 personal identification codes into the memory: Add a new code for an expected worker, and you won't need to be home to let him in. The Fingerprint Door Lock is also available for left-hand doors. To determine if you need a right- or left-hand door, stand on the outside, facing the door. If the hinges are at the left, it's a left-hand door. If the hinges are at the right, it's a right-hand door.