Flexible access with four methods: fingerprint, graffiti pattern, key, and passcode for secure and convenient entry. Durable and reliable material: constructed from a robust aluminum alloy to ensure long lasting use and interior security. Key override for reliability: if battery is low or fingerprint reading fails, you can unlock with the mechanical key so you are never locked out. Designed for interior spaces: suitable for home and office interior doors, built to withstand daily use. Use scenarios: - Family home with kids and guests: grant access via fingerprint or passcode; keep a spare key for emergencies. - Small office or shared space: issue temporary passcodes or fingerprints for employees and contractors; maintain control with a physical key as needed. - Short term rentals or hotel rooms: provide guests with a passcode and/or fingerprint access, with a back up key for property management. This description preserves the original functions and materials while presenting clear benefits, readability, and concrete use cases.