Smart door lock with five unlocking methods for flexible access and easy retrofit Key benefits Multiple unlocking options for convenience and redundancy: APP control, mechanical key, card, password, and fingerprint. Provides alternate ways to enter if one method is unavailable. Wide door compatibility: fits doors 38 to 80 mm thick, making it suitable for most residential and commercial doors. Durable material: aluminium alloy construction for a sturdy, lightweight exterior that resists daily wear. Retrofit ready for common mortise sizes: compatible with 5050 tenon and mortise to simplify installation and improve conversion rates when replacing traditional locks. Practical security and usability: biometric fingerprint and password access for quick entry, card and mechanical key for shared or emergency access, and APP control for remote management. Key functions and attributes Unlocking methods: APP, mechanical key, card, password, fingerprint. Door thickness compatibility: 3880 mm. Material: aluminium alloy. Mortise compatibility: suitable for 5050 tenon and mortise to support straightforward conversion from existing locks. Designed for straightforward installation on standard doors within the specified thickness range. Typical use scenarios Home front door: a traditional lock to add fingerprint, password, card, and app access for household members while keeping a mechanical key as backup. Office or meeting room: Provide staff with card or password entry, use fingerprint for restricted areas, and manage access via the APP for administrative control. Rental property or short term stay units: Retrofit existing 5050 mortise locks to offer guests temporary passwords or card access while maintaining mechanical key backup for maintenance. Why choose this lock Offers multiple, practical entry methods so users can choose the most convenient option for each situation. Fits a broad range of door thicknesses and works with standard 5050 mortises, reducing installation complexity for upgrades. Aluminium alloy construction balances durability and weight for everyday use. This product is intended for standard door installations that meet the listed specifications and functions.