Give a smart upgrade to your door with the Yale Approach lock. This lock installs easily over your existing deadbolt and enhances your door without altering its appearance. Unlock your door with the touch of a finger, thanks to the fingerprint scanner (99% accuracy). It offers multiple entry options, including a biometric keypad, virtual keys, and a backup key. | Yale Approach Lock KeyTouchscreen Wi-Fi Smart Lock with Biometric Keypad - Black