WiFi Smart Locks Deadbolt with Keypad, Hornbill Keyless Entry Digital Front Door Lock with Gateway Hub, Bluetooth Electronic Touchscreen Auto Code Lock Work with Alexa,Free App Control for Home Office, SMARTER - hornbill smart door locks can be controlled by app: Bluetooth unlocking, obtaining passcodes, remotely unlocking, sending e-keys, and automatic locking. Setting up, changing and deleting codes anytime, anywhere on your phone, SAFER - With high-technology, electronic deadbolt will automatically lock for 5 minutes when entering the passcode incorrectly more than 5 times. Long Battery Life, 4 AA batteries(not included) can provide 5000 openings (approx 6 months). You can also check the battery level in real time on the app, MORE CONVENIENT - Front door lock with gateway can be locked/unlocked by keys, TT Lock app, keypad, Alexa and manual. Remotely control your lock anywhere even if you are away from home. The unlocking record can be monitored in real time through the app, which is very suitable for the management of new house essentials, offices and apartments, MORE DURABLE - Both the front and back panel of this digital door locks are made of Zinc Alloy, anti-impact and suitable for harsh environments. Therefore, this deadbolt can be used not only indoors, but also in front doors, garage doors, etc., Excellent Customer Service - Our locks are easy to install, please refer to the manual or video for specific installation and operation. hornbill provides 30 days free return money-back & exchange service, 1-year warranty and lifetime technical support. Any questions(such as installation and app), please feel free to contact us at (888)988-2118., ,