smart Door lock video Youtube Installation Guide Here, you can find detailed instructions for installing smart door locks, allowing you to complete the installation without the need for professional skills. Y4 Smart Door Lock A4 Front Door Lock H1 Smart Lock With Handle Install & Set Guide How to reset the lock How to install the hornbill smart lock How to adjust the deadbolt How to fix the lock opposite issue How to place the ICwire How to replace the cylinder How to Set Up the hornbill Smart Lock How to reset and add the lock