4-in-1 Keyless Entry: The keypad door lock with handle eliminates lost keys by offering 21 user codes(4-10digits), unlimited one-time codes, an interior thumbturn, and 2 backup keys. Ideal for front doors, bedrooms, garages, apartments, and offices Quick Secure Locking: Programmable auto-lock (10-99s) for forgetful users. Lock instantly from outside by holding any key 2s, or even faster inside with the interior thumbturn. Perfect for quick security on-the-go or ensuring immediate privacy at home Passage Mode: Disable auto-lock and turn the interior thumbturn to activate Passage Mode. This is ideal for moving days, parties, or anytime continuous access is required Bank-Level Protection: Heavy-duty zinc alloy with ANSI Grade 3 lock resists break-ins. IP55 rating withstands harsh weather. 4 AA batteries (not included) provide 365-day battery life with low-battery alerts for year‑round home security Easy to Install: This keyless entry door lock fits most left- or right-handed doors (1-3/8”–2” / 35–50 mm thick, with a 2-1/8" (54mm) bore hole). Complete with step-by-step instructions and a video tutorial, you only need a screwdriver to install it yourself—no locksmith needed Away Mode: Once activated, it automatically disables all user codes except the master code for maximum security. The built-in alarm will trigger after 10 incorrect entry attempts. Ideal for vacations, business trips, or any extended time away from home Silent Mode with Backlit Keypad: Provides near-silent operation paired with a soft-glow keypad for visibility in low light. Ideal for night shifts, late-night returns, or homes with sleeping babies and children U.S.-Based Lifetime Support: Direct phone support (Weekdays 9 AM–5 PM PST and Saturdays 7 AM–3 PM PST) and 24/7 email assistance. Covered by 2-year product warranty and lifetime mechanical support, ensuring quick and reliable solutions throughout the installation and usage process