[Keyless Entry & Ergonomic Design]✦ This keypad door knob lock allows you to program up to 50 user access codes and 1 master code.the code in length can be 4 to 15 digit,easily programmed at the backlit keypad in seconds. An idealistic simplified look brings trendy style to the exterior & interior doors of your office, home and rental property,etc. [Enhanced Security & Durable]✦ This electronics keypad lock has the strength and durability optimized for commercial applications.Heavy-duty and contemporary design,premium metal construction and solid lock cylinder,easy-to-grasp handle.IP65 weatherproof,works great in any weather.Ideal for your entrance doors,front door entry,garage,utility room doors,side, backdoors,bedrooms. [Multi-functions & Smart]✦ Auto-locks behind you for peace of mind.Password disguise.Silent mode.Depending on your needs,you can enable Passage Mode.Backlit keypad will lit when pushing any button.Low battery warning,and you can use type-c usb backup (cable not included) in case that batteries run out.The backup keys are compatible with most mechanical keys. [Easy Install & Universal Fit ]✦This keyless entry door knob is a direct replacement for your standard doors,the free rotating knob makes it fit both left and right handed doors,door thickness：1-3/8 Inch to 2-1/2 Inch,with a 2-3/8 Inch or 2-3/4 Inch adjustable latch. Install in minutes with just a screwdriver. [Lifetime Customer Support]✦ No more lockouts.It is an awesome gift that can bring new excitement and convenience to you.Iulock door knob comes with a lifetime mechanical and finish. This Smart Keypad Door Knob (not deadbolt) Lock has the strength and durability optimized for commercial applications,with the convenience of keyless entry,has an idealistic simplified look,ideal for bedrooms,home offices,apartment,cloakrooms,utility rooms,garage,courtyard doors,swimming pool doors,laundry room doors. This electronic keypad lock offers a master code and 50 individual user access cods(4 to 15 digit),easily Add/Delete codes in seconds at the backlit keypad.Install is super easy,this keyless entry door knob is a direct replacement for your standard doors.Auto locks behind you for peace of mind.Password disguse.Silent mode.Weatherproof.The lock can be set to stay unlocked when you are going to be going in and out a lot,you can enable advanced passage mode: √0√Master code√1√,then no key or code required for access.Disable advanced passage mode: Master code√.The backup keys are compatible with most mechanical keys.Because the mechanical key and electronics of this knob are completely independent, the knob is a heavy-duty design,if use the key to access,PLEASE NOTE:use the knob help the key to turn the latch. 2 years battery life with 4 AA batteries (batteries not included),low battery audible warning.type-c usb backup(cable not included).Lighted keypad by pushing any button makes access easy at night.The interior knob of this door lock is always free to turn as one would hope.Fashion and security promise a fresh new look for your home/offices,make your life full of love and safe.