Multiple Unlocking Methods: Offers a variety of unlocking options including app, Bluetooth, mechanical keys, cards, passwords, and fingerprint recognition for enhanced convenience and security Premium Materials: Made from high-quality aluminum alloy, ensuring durability and longevity, while the polished finish adds a sleek and modern touch to your door Flexible Installation: Designed to fit doors with a thickness between 35mm and 55mm, and compatible with various door types such as steel, wooden, brass, and stainless steel, making it versatile for different door installations Bluetooth Connectivity: Features Bluetooth connectivity for remote control via smartphone, allowing you to unlock the door from a distance, providing ease of access and added convenience Easy Maintenance: Powered by 4 AA 1.5V non-rechargeable alkaline batteries (not included), making it simple to replace batteries when needed, ensuring continuous performance with minimal upkeep, Manufacturer: QZCX