♣ Smart fingerprint to unlock--Key is your Fingerprint,No need to enter password to unlock, To make life convenient for you，Advanced biometric fingerprint technology,resolution 508DPI，the recognition rate is up to 98%, don't worry about not recognizing it multiple times，only need 0.5S to unlock .Maximum support 40 fingerprints . | ♣ More secure and convenient for your life--Fingerprint Keyless Smart Door Lock,Zinc alloy ,Classic American ORB style，unique appearance with novel design.Hidden hole with two emergency keys, Even if you forgot to replace the battery, you can unlock it directly with the key. | ♣ Universal to install in left and right direction--Fingerprint Handle Door Lock ,don’t be afraid the direction of the handle is not the same as the direction of the door after buying,only turn direction of the screw according to direction of the door ,simple and easy to operate. | ♣ Low voltage alarm --when the battery voltage is lower than 4.8V,the red LED lamps flashes continuously for 5 time still unlock about 10 times.4×AAA alkaline batteries(not include) for long standby time,the battery will work about 1 year. | ♣ Fingerprint door lock for home--Single latch door,most people can install it by own.Applicable door thickness between 35mm to 50mm (1.4 to 2.0 in) and combined with the adjustable deadbolt mortise 60mm to 70mm (2 3/8" to 2 3/4").Alloy body perfect for Home Office Apartment Hotel Garage School Wooden.