TTLock APP control & Passcode & Mechanical Key & Bluetooth.
Remote Voice control with Alexa and Google assistant (need a G2 gateway).
Note: (US Standard) Before you buy, please note: this lock is only for the door thickness is between 38mm(1.5") ~ 48mm(1.88")
The following videos for your reference:
1. How to Install Hornbill Smart Lock：https://youtu.be/P_Is0bnf-zQ
2. How to Set up TTLOCK app for Hornbill Smart Lock: https://youtu.be/eEfsjfncLaw
3. How to Use Alexa to Control the Hornbill Smart Lock: https://youtu.be/btTkTbb9siI
Some accessories need to be modified in length according to the actual door thickness. If you have any questions, please contact our customer service in time.