Model K1 smart door lock — compact, secure access for residential and light-commercial doors Key benefits and why you need it Fast, reliable entry: 0.25-second fingerprint recognition reduces wait time and avoids fumbling for keys. Multiple backup options: biometric access plus Tuya app (Bluetooth), mechanical keys, and voice control (Alexa/Google Assistant) ensure you always have a way in. Fit and finish that adapts: reversible handle and adjustable latch accommodate left- or right-handed doors and a wide range of door depths. Secure, practical hardware: semiconductor fingerprint sensor with storage for up to 20 fingerprints and a durable polished aluminum alloy exterior. Main features and performance Model: K1 Fingerprint sensor: semiconductor type; unlocks in about 0.25 seconds; stores up to 20 fingerprints Additional access methods: Tuya app (Bluetooth), mechanical keys, voice control compatible with Alexa and Google Assistant Power: 4 × AAA batteries (user-supplied) Materials and finish: polished aluminum alloy Handle: reversible design for left- or right-handed doors Latch adjustment: 60–70 mm to match different door depths Door compatibility: suitable for steel, wood, and stainless steel doors with thickness from 35 to 55 mm Practical advantages Reliable everyday use: quick fingerprint recognition plus app and voice options let family members, employees, or guests enter easily. Redundancy for peace of mind: mechanical keys act as a fail-safe if batteries run low or mobile devices are unavailable. Flexible installation: adjustable latch and reversible handle reduce compatibility issues during replacement or retrofit. Compact battery solution: runs on common AAA batteries that are widely available and replaceable by the user. Typical use scenarios Home front door: Provide fast, keyless entry for family members while retaining mechanical key backup for maintenance or emergencies. Small office or studio: Register staff fingerprints and control access through the Tuya app; use voice control for hands-free operation when carrying items. Short-term rentals and property management: Give guests temporary access via app or set up fingerprint entry while keeping mechanical keys for cleaning staff and managers. What makes it stand out Combines biometric speed with multiple proven backup methods (app, voice, and keys) so you do not rely on a single access route. Adjustable latch and reversible handle increase the chance of a direct fit with existing doors, minimizing the need for door modifications. Semiconductor sensor and a polished aluminum alloy chassis balance security, durability, and modern appearance. Compatibility checklist before purchase Confirm door thickness between 35 and 55 mm Ensure latch depth can be set within 60–70 mm Plan for power: 4 AAA batteries (not included) Confirm desired smart features will work via Bluetooth with the Tuya app and with Alexa/Google Assistant voice control if required Model K1 provides a practical, multi-mode locking solution for homes and small businesses, combining fast fingerprint access, app and voice control, and mechanical key backup with adaptable hardware to fit a wide range of doors.