Keyless Entry by One Fingerprint Touch. Two ways to unlock: by fingerprint or mechanical key (hidden). Add and delete fingerprints freely. 3 admin fingerprints and 297 guest fingerprints max. Unlock anytime by backup mechanical key.
Fit Interior Doors: standard single latch door, door thickness between 1-3/8" and 1-3/4" (35 - 45 mm), adjustable backset 2-3/8" or 2-3/4". Suitable for home and office interior doors. Not suitable for outdoor use (not waterproof).
Reversible Lever: fit both left-handed and right-handed doors. Freely change handle direction.
Auto Locking & Sturdy Mechanism. Re-lock automatically after 3 seconds if no action. Strong and solid frame of zinc alloy and stainless steel.
Easy to Install and Change Batteries. With drawing for Drilling. Powered by 4x AA batteries (not included). Batteries can last 10 to 15 months under normal use. Low battery power alarm. Package includes a whole set of lock, 2 metal keys and user manual.