Hop on over to Amazon where you can score this ?Fingerprint Door Lock Only $49.99 (Regularly $99.99)? when you use promo code 20LY85DJ at checkout.

Simply press the lock button or set the keyless door lock automatically lock in 5sec/10sec/15sec/20sec to avoid forgot locking the door while leaving in hurry. Inside the door, you can turn rotary knob or press lock/unlock button to lock/unlock the door.

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