Our Keyless Entry Door Lock is 100% mechanical - It works solely with code combination no need for keys, batteries, power installation, or wiring. Enjoy the peace of mind of not having a bulk of keys that are easily lost, take control of the access at home and at work with our double-sided keyless door lock, which features two stand-alone keypads that allow you to set in and out security with ease. Why you'll love our keyless entry door lock with lever handle? - Absolutely No batteries or keys needed - 3500 + possible combinations, frustrate any unauthorized access - Handy "Passage Mode" function, allows you to temporarily set up free access with ease - Drop Pin Code Design creates multi-function code options - Codes with up to 9-digits that can unlock the latch in any order - Fit any standard door thickness (35-54mm/1.37-2.12 inches) - Sleek, Aesthetic, Sturdy design for your everyday security and comfort If you want a sturdy and hassle-free security solution, look no further, our combination lock door latch includes everything you need to install and includes a 1-year manufacture warranty; unlike others, our locks are made to stand the test of time.