LNDU D500 Keyless Smart Fingerprint Door Knob

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Backup Key for Emergency Access – Includes 2 physical backup keys, providing a reliable alternative entry method when needed. Enjoy peace of mind knowing you can always unlock your door in unexpected situations. • Stores Up to 50 Fingerprints – Supports up to 50 fingerprint profiles, allowing family members, roommates, employees, and trusted guests to enjoy fast, secure, keyless entry without sharing keys. • Low Battery Alert & Long-Lasting Performance – Built-in low battery notification reminds you when it's time to replace the batteries. The smart fingerprint lock delivers up to 180 days of operation under typical use (approximately 10 unlocks per day). • Silent Mode for Quiet Environments – Activate Silent Mode to mute operation sounds, making it ideal for nighttime use, nurseries, bedrooms, apartments, and homes with babies or light sleepers. • Easy DIY Installation – Install in minutes using only a screwdriver—no professional help required. Fits standard doors with 2-3/8" (60mm) or 2-3/4" (70mm) backsets and door thicknesses from 1-3/8" to 2" (35–50mm). Perfect for bedrooms, apartments, homes, offices, hotels, and rental properties. Show more