Features:  & 12304;Smart Fingerprint Biometrics& 12305; The fingerprint door lock is equipped with the upgraded 508 DPI fingerprint sensor module of 120 X 120 effective pixel, which translates to more than 98% recognition rate in 0.3 seconds. Faster and more convenient than using traditional key and more secure with your own unique biometric identification. & 12304;Easy DIY Installation& 12305; Fits most standard single-cylinder US doors. The simple installation takes minutes with a screwdriver (included) without extra drilling. Universally fits door thickness between35-40mm, adjustable latch 2-3/8" (60mm) or 2-3/4" (70mm). Kindly check your door size before purchase. Follow our video if you still have any doubts. & 12304;User Friendly Features& 12305; We want our keyless entry door lock to be worry free. Our locks store 50 sets of fingerprints with the first fingerprint as the admin role. Our lock can be operated by code, IC card, and smartphone and key. Our door lock knob could be configured for left opening or right opening doors. The door lock comes with Auto-lock functions as well as always open mode. With these features, the lock is suitable for all kinds of scenarios, bedroom, hotel, offices, store room, etc. & 12304;Lower Power Consumption& 12305; Our door lock used 4 AAA Alkaline batteries that last about 1 year. (batteries are not included) When the batteries are almost running out, there will be voice to remind you to change your batteries. In addition, we provide a micro USB cable as an emergency power supply to unlock the door, just in case your power is totally flat. & 12304;Worry Free Warranty& 12305; Your satisfaction is our greatest joy. We not only provide detailed installation guide and clear user instruction but also 12 months warranty and free life-time technical support. If you have any questions, please feel free to contact our customer service. Specifications:  Model: WF-M4 Color: Black/Coffee Gold Material:Zinc Alloy Supply: 4*AAA Batteries(not included) Unlock Methods: Fingerprint/Password/Key/Smartphone Fingerprint Capacity: 50pcs Password Capacity: 200 groups UnlockSpeed:<0.3S Working Temperature:-20& 8451;~60& 8451; Working humidity:0-90%RH Package List: 1 * front knob 1 * rear knob 1 * User Manual 1 * Screws Bag ( Thickness of Door is 35-55mm.) 1 * Latch (60/70mm)