Keyless Entry: Our door lock system provides 20 access code (4-10 digit codes) for easy room entry without the need for a key. Say goodbye to the worry of forgetting your keys Smart-Locking: Our door lock system features automatic locking that can be set to lock in 10-99 seconds. Additionally, we a one-touch auto-lock option that simply requires holding down any key on the keypad for 2 seconds One-Time Code Feature: Our door lock system allows for one-time access codes to be set for guests, neighbors, cleaners, and delivery personnel. used, the code is automatically deleted to the safety of your home Security Deadbolt: Our door lock system features an ANSI Grade 3 smart door lock cylinder made of durable and powered by 4 AA batteries, providing over 1 year of use. It also has an IP54 weather resistance rating. Combination Door Lock: Our front door lock set includes 2 passage door knobs and a keypad deadbolt lock. It comes with anti-peeping password, mute mode, vacation mode, backlit keypad, making it perfect for and Easy Installation: Our door lock system can be easily installed with just a screwdriver in just a few minutes, making it suitable for both men and women. Our deadbolt is only suitable for 2-1/8inch (54mm) door holes, and is not compatible with 38mm door holes, Applicable door thickness is 30~50 mm Battery: 4 AA batteries(without) size: 129 x 73.8mm Material: aluminium colour: black Package Contents: 1 x Locks 1 set accessories 1 x English Description Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.