LNDU D500 Smart Fingerprint Door Knob with APP Control, Biometric Keyless Entrance Door Lock with 3 Modes (Privacy/Passage/Auto-Lock), 3 AAA Batteries Powered, 100 Fingerprints, Type-C Emergency Power for Unlocking, for Bedroom, Office, Home

[3-in-1 Keyless Entry] Say goodbye to fumbling for keys! This smart door knob offers 3 secure unlocking methods: Advanced Fingerprint, Smartphone APP, and Mechanical Key. [3 Versatile Modes for Any Scenario] Customize your door's behavior to fit your life. Choose from Standard Mode (auto-locks upon closing for daily security), Passage Mode (keeps the door unlocked for frequent entry during meetings or moving), or Privacy Mode (disables outside electronic access, perfect for sleeping or alone time). [Smart Bluetooth Control & Custom Auto-Lock] Connect and manage your lock seamlessly via Bluetooth using the mobile app. You can store and manage up to 100 fingerprints for family members, roommates, or employees. Plus, you can easily enable the auto-lock feature and customize the time delay before the door locks behind you, giving you total peace of mind. [Ultimate Privacy & Security] Designed to protect your personal space. When switched to Privacy Mode, the lock strictly defends against outside intrusion—electronic methods (fingerprint/app) will be temporarily disabled. Only interior operation or an emergency mechanical key can open the door, ensuring absolute safety for bedrooms, hotel rooms, and private offices. [Emergency Unlocking] Powered by 3 AAA batteries, this smart lock ensures dependable daily operation. In the rare event the batteries die completely, you can easily access the door using the included physical keys, or temporarily power the lock via the built-in Type-C emergency port with a power bank to unlock it.