With fingerprint recognition technology, you can easily give your children or other family members access to your home without needing to worry about them losing the keys. Uses the latest biometric entrance technology with 150 fingerprint storage capacity for single latch tubular model. Replaces any standard door lock. Fingerprint door lock offers a sliding front cover that not only allows protection for the optical sensor but also activates the fingerprint scanner when lifted and it can be accessed by fingerprint, passcode, or backup key. Powered by 4 AA batteries which will handle 15,000 usages.