Door Knob With Fingerprint Recognition, Fitnate Bluetooth, Simple To Install. Product Details ??4-IN-1 Unlock Ways?Smart door knob has 4 unlock ways : Fingerprint + Password+Mechanical Key+App Bluetooth Control?Download Tuya app)?give your family or friends more ways to open doors.One lock could store up to 255 users fingerprint. ??Feature-rich and Multi-scene use? Smart lock is suitable in most standard doors in the US. The door thickness between (1.26~1.89inch). It work perfectly in different settings from bedroom, study, garage, basement, office, hotel etc. ??Easy Installation and Programming?Keypad door lock is easy to install. All it takes is a small screwdriver, and about 10 minutes to install. Detail Install Guides you can refer to the File of "Installation Instructions ".Password programming design is also very user-friendly, simple operation. ??Sturdy Stylish?Smart lock is made up of metal material, use exquisite design to make the handle anti-slip and comfortable to grab when rotating.With automatic locking retractor, the electronic door will automatically lock behind you after opening for 3 seconds. ??Safety Insurance and Customize Management?Set passwords to protect family, friends or tenants.Maximum length is up to 10 digits.Using Bluetooth to switch the door on and off, you could check the records about unlocking and wrong passcode in real time. You can share password with your family anytime, anywhere. ??User-Friendly Design?Smart lock is equipped with a backlight mode, which allows you to clearly see the keyboard in a dark environment. What?s more, it is waterproof and the waterproofing grade reaches to 4 levels. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.