Latest Instruction Manual: Uploaded on the product page – refer to it before installation and use for accurate operation steps 4-in-1 Unlocking for All Scenarios: 4 unlock ways (APP/remote, fingerprint/all ages, passcode, 5 backup keys) fit Airbnb (tenant access), families, businesses. 100 user codes + one-time codes (cleaners/pet sitters) solve key management troubles. APP Remote Control + 4 Password Modes: Manage access away from home! APP has 4 password modes: one-time (couriers, auto-expiring), time-limited (repairmen), recurring (weekly/monthly cleaners). Check real-time logs; remote-unlock when guests ring for smooth entry. Auto-Lock + One-Touch Lock: Worried about forgetting to lock? Custom 5-60s auto-lock (perfect for morning rushes). Inner/outer keypads have one-touch lock—press to lock instantly, even with full hands. No more "did I lock the door?" anxiety. ANSI/BHMA Grade 3 Security Protection: Anti-peep passwords + 5-wrong-attempt lockout block unauthorized access. Anti-pick cylinder resists break-ins, meeting ANSI/BHMA Grade 3 (U.S. residential/commercial security standard). Protects homes, offices, rentals. IP54 Weatherproof & Zinc-Alloy Material: Zinc-alloy lock + IP54 resists dust/moisture. Fits indoor/outdoor (porches, garages) and operates stably in all U.S. weather conditions. Low-Power WiFi + Long Battery Life: No frequent battery changes! 4 AA batteries (not included) last 6+ months. Low-power WiFi activates only on doorbell presses. Low-battery alerts (APP/keypad); Type-C power bank unlocks if dead—no lockouts post-vacation/overtime.