3 in 1 Smart Fingerprint Door Knob - Keyless Entry Smart Door Lock with App Control + 2 Keys + Finger Print Aluminum Alloy Biometric Door Knob for Bedroom / Cloakroom / Apartment / Office / Hotel Features: 【Smart and Convenient Locking】The Smart Door Knob is designed to provide a convenient and secure locking solution for your home or office. With its advanced technology, it allows for real-time recording of access, ensuring enhanced security for your property. 【Multiple Unlocking Options】This Door Knob offers multiple unlocking options, including fingerprint recognition, BT connectivity via the Tuya App  and mechanical keys. You can easily unlock the door using your fingerprint, and can also directly use the key to open the door or control it remotely through the app, providing seamless access for you and your family. 【Low Battery Reminder】Never worry about running out of power with the Low Battery Reminder feature. When the battery is running low, the Fingerprint Door Knob will notify you in advance, allowing you to recharge it conveniently using the Type-C charging port. 【Versatile Applications】Whether it's for your bedroom door, office, apartment, or even a guest house, this Thumbprint Door Knob is suitable for various indoor spaces. Its compact and stylish design ensures it blends seamlessly with any decor while providing maximum security. 【Easy Installation and Operation】With the Tuya App, installation and operation are a breeze. Simply download the Tuya App from compatible with Play or the App Store, or scan the provided QR code. The user-friendly interface and intuitive controls make it easy to set up and manage your Fingerprint Lock effortlessly. Specification: Product material: Aluminum alloy Product size: Front handle: 70 x 58mm / 2.76 x 2.28in Rear handle: 67 x 58mm / 2.64 x 2.28in Product color: Black Battery: 4*AAA Alkaline batteries (NOT included) Waterproof rating: IP45 Door thickness: 38-50mm / 1.5-1.97in Door frame: ≥110mm / 4.33in Working temperature: -20°C - 70°C / -68°F - 158°F Working humidity: 20%-80%RH Working power consumption: ＜200mA Static power consumption: ＜80uA Unlocking methods: Tuya APP - (BT), fingerprint, mechanical keys User capacity: 50 fingerprint users Application: The APP supports compatible with Android 4.3 / iOS7.0 version and above Packing List: 1 x Front Handle 1 x Rear Handle 1 x Single Latch 2 x Mechanical Keys 1set x Screws 1set x Tools 1 x Manual