4-in-1 Smart Access: The door lock offers versatile unlocking via fingerprint, passcode entry, the Lockin Home App (remote access requires a gateway), or a backup physical key. These multiple options ensure flexibility and eliminate the stress of misplaced keys, making entry effortless and secure Effortless APP Management: This keyless fingerprint door lock leverages biometric technology for swift fingerprint recognition in just 0.2 seconds and supports up to 20 personalized fingerprints and passcodes. Seamlessly manage users, share access, and track unlocking history through the app, the smart lock offering unparalleled convenience and control Auto-Lock & Privacy Protection: Our door knob with lock automatically engage within 5 seconds after closing or fingerprint use. Activate privacy mode with a simple thumb turn for enhanced protection, making it ideal for families and personal spaces Reliable Power with Emergency Options: Equipped with a 400mAh rechargeable battery, Lockin door knob features a Type-C port for easy recharging(fully charges in 3-5 hours). Emergency USB power and low-battery alerts ensure your front door lock stays operational 24/7 Enhanced Security Modes: Switch to passage mode for unrestricted access or privacy mode for controlled entry—where only the admin’s fingerprint unlocks the door. Through usinge anti-peep technology by entering random numbers before your actual passcode, the smart door knob ensure you added safety for bedroom, hotel, office or rental property Experience keyless freedom with the Lockin 4-in-1 Smart Door Knob. This innovative fingerprint door lock eliminates the worry of lost keys by offering four secure access methods: biometric fingerprint recognition, custom passcodes, remote control via the Lockin Home App, and a physical backup key. Perfect for your front door, bedroom, apartment, or hotel, it automatically locks behind you for ultimate peace of mind. The rechargeable battery with emergency USB power ensures you're never locked out. With easy DIY installation and advanced features like anti-peep passcodes and privacy mode, this keyless entry door lock provides the perfect blend of effortless convenience and enhanced security for your smart home.