Custom access control for guests, renters, family, cleaners, maintenance, and more - assign entry codes to individuals with expiration dates/times, while being notified whenever that code is used and if the door is locked or unlocked. This push-button electronic deadbolt provides security and durability while enhancing your lifestyle. SPECIFICATIONS: Sleek metal housing for enhanced quality Key-less entry convenience with one touch locking Tamper resistant interior cover 11 button back-lit keypad Easy installation - replace existing door hardware with just a screwdriver One touch motorized locking mechanism Remote locking and unlocking via Never Away mobile app, with battery sensor and text message alerts Function: Single cylinder deadbolt Power Source: 4 AA batteries Battery Life: Approx. 1 year Door Handing: Reversible 30 user codes plus master code feature for added security BHMA grade 2 certified 20 minute fire rating - UL certified Full 128-bit encryption security SmartKey technology - re-key it yourself in just three easy steps Fits standard doors (1-3/8in. – 2in.) Limited lifetime mechanical and finish warranty, 1 year electronics warranty To keep your property totally key-less and convenient for your guests, we recommend disabling the locking function on your existing door handle; if you're unfamiliar with this process, you can also switch it out for a simple, non-keyed door handle. Our smart deadbolts are all that you need for security, durability, and total entry control.