Smart digital door lock with multiple access methods and robust hardware for homes and businesses. Constructed from aluminium alloy with a touch screen and semiconductor fingerprint sensor, it combines security, convenience, and wide compatibility. Key benefits Multiple ways to unlock: app, fingerprint, password, smart card, or mechanical key for flexible access. Remote control and monitoring: connect via the Smartlife app for remote unlocking and access records without a separate gateway. Strong performance and reliability: dual core chip and FPC semiconductor fingerprint sensor for fast and accurate recognition. Long battery life: uses 4 AA 1.5V alkaline batteries for extended endurance compared with AAA solutions. Easy replacement and installation: fits doors 38 to 55 mm thick and supports many mortise sizes for direct swap with existing locks. Main features and specifications Material: aluminium alloy housing for durability. Unlock modes: app, fingerprint, password, smart card, mechanical key. Fingerprint reader: FPC semiconductor sensor. Chip type: dual core driver for stable processing. Touch screen: IML material. User capacity: supports up to 99 users for fingerprints, cards, and passwords. Password function: supports virtual password entry to hide real codes. Power: 4 x AA 1.5V batteries required, batteries not included. Use non rechargeable alkaline AA cells for endurance. Operating temperature: minus 20 to 55 degrees Celsius. System voice prompts: Arabic, English, Indonesian, Portuguese, Russian, Spanish, Thai, Vietnamese. Applicable door thickness: 38 to 55 mm. Applicable door types: steel doors, wooden doors, brass doors, stainless steel doors, and other common door materials. Direction and handle: universal for right and left doors, push and pull opening. Handle direction can be adjusted. Smartlife app features Connects directly to Wi Fi without a separate gateway. Remote unlock from your phone. View unlock records with timestamps. Create temporary and timed passwords for visitors. Installation and compatibility Designed to conventional mortise locks. There are more than 24 mortise lock size options available. Measure your existing mortise before ordering to choose the correct size for a straightforward replacement. Suited for standard residential and commercial door installations where thickness is between 38 and 55 mm. Universal mounting supports left or right handed doors and push or pull opening styles. Package contents Front panel x 1 Rear panel x 1 Mortise lock x 1 (selectable size) Smart card x 5 Mechanical key x 2 Screw kit x 1 Available colors Black, Silver, Red Bronze Practical use scenarios Home front door: grant family members fingerprint access, set temporary passwords for guests, and check entry records from your phone. Small office or studio: issue smart cards to employees, control access remotely, and review unlock logs for security oversight. Rental property or short term stay: create timed passwords for guests and avoid physical key exchanges. This lock is a practical upgrade for users seeking a durable, multi access smart lock that integrates app control with biometric and card access while remaining compatible with a wide range of door types and mortise sizes.