Your finger is the only key you ever need for this Fingerprint Door Lock, Designed for unsurpassed security and convenience. Automatic locking, never leave your door unlocked again Solid construction with the PCB sealed with epoxy to prevent moisture, corrosion and loosening. Fingerprint verification and door lock combined in single unit for easy installation. Available for left hand and right hand opening doors. Stainless steel tubular single deadlatch mortise: Easy to install and simple to operate. Fingerprints can be enrolled/erased on the lock directly with lock on door.