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3D Face Recognition: Uses infrared scanning to provide high-speed, secure hands-free unlocking, even in low-light conditions. Built-in Visual Doorbell: Features an external camera and an internal LCD color screen so you can see visitors before opening the door. Smartphone Integration: Fully compatible with the Tuya Smart / Smart Life App for remote unlocking, temporary password generation, and real-time notifications. Two-Way Audio: Integrated microphone and speaker allow for real-time communication with visitors via your smartphone. Multiple Unlock Methods: Supports Face ID, Fingerprint, Anti-peep Touchscreen Password, IC Card, Mechanical Key, and App Remote Control. Enhanced Security: Equipped with a high-security C-level lock cylinder and a heavy-duty multi-point stainless steel mortise. Emergency Power: Features a hidden mechanical keyhole and a USB emergency power port in case the internal lithium battery is depleted.