The Stoneuk ST-D1K is a sleek and intelligent keyless smart cylinder lock designed to enhance security and convenience. It supports multiple unlocking methods, including password, IC card, key fobs, mobile app, and manual key override, providing flexible access for a wide range of users. Suitable for most European-style doors, the ST-D1K offers an easy upgrade to smart access control without the need for structural changes. Integrated with the TUYA app platform, it enables real-time access management, remote unlocking, and activity monitoring directly from a smartphone.