[HARMONIZING WITH ANY DOOR] This square-shaped door knob with keypad combines sleek, modern aesthetics with practical durability. Built to resist moisture and withstand weather, it's ideal for entrances, front doors, bedrooms, garages, apartments, and both exterior and interior doors for enhanced privacy. [CUSTOMIZABLE SECURITY] You can store up to 50 personalized passcodes (115 digits) for family, guests, or staff. The backlit keypad of this electronic door knob lock ensures easy operation day or night, while anti-peeping technology protects your code. For added security, two mechanical keys are included for traditional backup access. [FLEXIBLE LOCKING MODES FOR EVERY NEED] This smart door lock offers a flexible locking experience. The auto-lock feature (programmable from 2 seconds to 12 hours) ensures you never forget to secure your door. A manual mode provides full control, while guest mode is perfect for occasions when you don't want to enter a password. Silent mode