Fingerprint Smart Door Lock, Keyless Entry Smart Lock for Front Door, Electronic Keypad Code Door Lock, Bluetooth Smart Deadbolt, Biometric Fingerprint Key Fobs Smartphone Access. Brand new in box, bought for back door, but using another variant of this lock. Uses an app on iPhone and Android, can be unlocked with fingerprint, fob, key or passcode. Comes with AAA batteries (takes four, and they last for about 6 months). no returns
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