IRONZON Fingerprint Door Handle for Bedrooms - 191Y 4-in-1 Fingerprint Door Lock with Keypad and App Control, Smart Knob for Bedroom with Key, Keyless Entry - Silver

Fingerprint Door Knobs: The Future of Home Security Modern fingerprint door knobs revolutionize home access with lightning-fast biometric recognition (0.2-0.5 seconds) that eliminates the need for keys. These systems offer ultimate convenience through multiple unlock methods - fingerprint, smartphone app, keypad codes, and backup keys - ensuring you never get locked out. Key benefits include comprehensive family management (50+ fingerprints, 100+ codes), automatic security features like auto-lock and privacy modes, and temporary access control for guests or service personnel. The technology has matured across all price ranges - budget options ($30-50) offer basic functionality, mid-range systems ($50-80) add premium materials and enhanced app features, while high-end models ($80-130+) include built-in WiFi and professional-grade security. Installation is DIY-friendly for standard U.S. doors, with emergency backup options preventing complete lockouts.

• 4-in-1 Unlocking System: No more worrying about lost or forgotten keys. Your fingerprint is always with you and cannot be duplicated without permission. This smart door knob supports fingerprint (up to 50 users), passcodes (up to 100 users), app control (gateway required for WiFi), and 2 backup keys for secure and flexible access
• Privacy-Focused Design: All fingerprint and app data are stored locally only, with no cloud upload. When paired with the Tuya Gateway, you can enable remote control and unlocking via smartphone. Suitable for homes, apartments, offices, bedrooms, and garages
• Easy Installation & Low Maintenance: Designed to fit standard U.S. doors, with a clear manual and installation template included. Compatible with both left- and right-handed doors. Alkaline batteries are recommended for stable performance
• Convenient Keyless Access: Create temporary passcodes for guests, cleaners, delivery personnel, or Airbnb visitors. Codes expire automatically-no need to share physical keys. Backup options include mechanical keys, USB-C emergency power, and app access to prevent lockouts
• Quick Mode Switching & Auto Lock: Easily switch between Privacy Mode and Passage Mode with a short press. Press and hold for 3 seconds to change lock modes. The lock automatically secures after 5180 seconds, so your home stays protected
• Complete Set & Support: Includes all components for installation—no extra tools needed. Comes with a quick guide and manual for fast setup. Backed by one-year technical support for a smooth and reliable experience.