Features 1、Multiple Unlocking Modes: The fingerprint door lock supports various unlocking modes: fingerprint, password, mechanical key, app, and card. You can choose your preferred mode. 2、Integrated, Sleek Design: With integrated structure design, keypad door lock boasts a simple and robust appearance. It uses 4 AAA batteries (not included) which offer long lasting power. 3、Emergency Power Supply: When the battery power is low, the lock reminds you to replace the battery. In the event of battery exhaustion, you can either use a mechanical key or plug a power bank into the Type C interface at the bottom for temporary power supply. 4、Family Friendly Functionality: The lock can be set to stay unlocked, a useful feature particularly for families with children and elderly members. It allows them to gain access easily. 5、Versatile Application: Smart door lock adapts to doors with thickness between 35‑55mm and can be widely used in various settings such as hotels, guest houses, apartments, rental homes, homestays, dormitories, and more. Specification Item Type: Smart Door Lock Material: Zinc Alloy + ABS Storage Capacity: 300 (Fingerprint: 50) Fingerprint Head Type: Semiconductor Card Type: M1 Card, IC Card Fingerprint Speed: ≤0.3S Static Power Consumption: 80uA Emergency Interface: Type C Unlocking Methods: Fingerprint, Password, Card, APP, Bluetooth, Key Applicable Door Thickness: Approx. 3555mm / 1.382.17in Power Source: 4x1.5V, AAA Alkaline Batteries (batteries not included) Applicable Doors: Office Doors, Home Wooden Doors Package List 1 x Outer Lock1 x Inner Lock1 x Lock Core2 x Square Bars2 x Keys2 x IC Cards1 x Locking Plate1 x Plastic Box4 x Screws (Metal color)2 x Connecting Threads2 x Screws (Long: Black)2 x Screws (Medium Long: Black)3 x Screws (Short Long: Black)2 x Double Headed Screw Sleeves1 x Back Cover1 x User Manual