Lose your keys, for good: Unlock your door using your entry code on the keypad, and leave the bulky keychain behind. For use with your smartphone or smart home system, Yale Access Upgrade Kit is required (sold separately). | Auto-Lock for peace of mind: You didn’t forget to lock the door, your lock did it for you. Rest easy knowing that your door is locked every time you leave the house and when you go to bed at night. | Easy to install on any door: Not so handy? Not a problem. Yale Assure locks are super easy to install and are guaranteed to fit standard doors (doors 1-¾” to 2-¼” thick. Doors under 1-⅜” require thin door kit). | Stop hiding keys: Sharing codes is the new hide-a-key. Give unique codes to friends, family, and other people you trust, and never put a key under the doormat again. | Upgrade to Wi-Fi with Yale Access: Use just the keypad for now, and upgrade to a smart lock whenever you’re ready. Our Yale Access Upgrade Kit (sold separately) lets you use your phone as your key. | Comes with a couple keys, just in case: If you’re not ready to lose your keys for good, two physical keys are included in the box. | Modern look for your modern life: Yale Assure locks feature clean lines, a slim profile, and come in a variety of beautiful finishes, including satin nickel, oil rubbed bronze, and black suede, to match any home’s design. | Works great in any weather: Yale Assure Locks can withstand temperatures from -22°F to 140°F, and the touchscreen keypad has backlit numbers that won’t wear off and is smartphone glove-friendly. | Long battery life: Four (4) AA batteries last an average of 18 months, and a low battery indicator will tell you when it’s time to change them. | Trusted every day for over 180 years: A brand trusted for generations. Yale locks come with a limited lifetime warranty for finish and mechanical and 24/7 customer support.