Smart door lock has a user-friendly keypad, allowing you to easily enter your passcode to unlock the door, eliminating the need for traditional keys. This feature allows you to grant access to family and friends, without the hassle of making copies of keys. A one-time pin code can be set for service people or guests. Auto lock function is available, so no more worrying about whether you've remembered to lock the door on your way out. [EASY INSTALLATION] Our keyless entry door lock is designed to be easily installed and can replace your existing mechanical door knob with lock of a front door lock set without any additional modifications. With just a few simple steps, you can upgrade your home's security and enjoy the convenience of front door lock set keyless entry. Please note 4 AA bateries are NOT inlcuded but required for the keyless function. [STYLISH DESIGN] This electronic door lock for front door handle features a classic design that seamlessly integrates with any traditional front door style, making it an attractive addition to your home's exterior. Our deadbolt lock is designed for door holes that are 2-1/8" (54mm) in diameter, NOT for 38mm door holes. BRAND NEW