3-In-1 Unlock Ways: The advanced and convenient smart door handle has 3 unlocking methods: fingerprint unlocking, app control unlocking, emergency spare key, making entry and exit more convenient. Security: FITNATE smart door knob features advanced fingerprint technology to prevent unauthorized access,fast fingerprint recognition unlocking. You can add up to 20fingerprints for convenient access and monitoring. App Control: Door locks for apartments can be operated remotely via Tuya apps. Share Ekeys with family members, friends, or neighbors and set automatic lock/unlock schedules to manage who enters your home. Unique Modern Design: This door lock features a comfortable and ergonomic lever shape, allowing for easy gripping and operation.The smart door lever is reversible for both left-handed and right-handed doors. Easy to Install: The keyless door lock can be easily installed with a screwdriver fits most doors which thickness is 32mm/1.25inch-48mm/1.89inch,easily replaces existing door locks. Note:4 AAA batteries are required(batteries not included). The smart door lock is suitable for wooden doors, fire doors, security doors, etc.