3D Face Real-time Intercom Smart Door Lock Security Face Camera Intelligent Fingerprint Password Biometric Electronic Key Unlock. 3D Face, Real-time Intercom, Fingerprint, Password, IC Card, Mechanical Key, APP. Suit For Door Type. Wooden, stainless steel, bronze, Double, Old-fashioned security doors. English Voice and menu. Built in Rechargeable lithium battery. Left Open and Right Open All compatible. 6 unlock ways: 3D infraed Face, Fingerprint, Password, IC Card, Mechanical Key, APP(Real-time Intercom) 2. Carved alloy Material Built Strong enough to protect your home; 3. Locking & Unlocking automatically with the newest automatic technology to free your hands; 4. Indoor double lock knob gives you one more safeguard; 5. Emergency power supply in case of lost power; 6. One time full charge can work about 3 month. English Voice and menu 8. Query unlock records in the lock 9. Infrared Sensor Camera make it also can work well in dark environment 10. Suit for Lots of door type: Wooden door, stainless steel door, bronze door, Double door, Old-fashioned security doors 11.