Wide Door Compatibility: This smart lock fits a variety of door types, including steel, wooden, brass, and stainless steel doors, with an adjustable fit for door thicknesses ranging from 35mm to 120mm, making it highly versatile for different installations Multiple Unlocking Options: Featuring biometric fingerprint recognition, keypad, card, mechanical keys, and app or WiFi access, this lock provides flexible and secure unlocking methods to suit diverse user preferences Built-in Doorbell: A built-in doorbell function adds convenience by allowing visitors to ring your doorbell directly from the lock, enhancing both security and accessibility without needing a separate device Reliable Connectivity & App Control: With WiFi connectivity and compatibility with Tuya/Smart Life apps, you can manage the lock remotely, providing real-time control and monitoring from your smartphone, even when you're away Secure: Made from high-quality aluminum alloy with a polished finish, this lock is built to withstand the elements and provide long-lasting durability. It also includes low battery alerts and supports up to 100 users, making it for both home and business use. Operating in a wide temperature range of -25°C to 60°C ensures reliable performance in diverse climates, Manufacturer: LLOOPK