New technology smart door lock with 3D face recognition biometric fingerprint smart lock with built-in microphone and speakers with video calling feature allow you to see who's at your door from anywhere at anytime on your mobile device and interact with them directly from your phone , also allow you to take screen shot or live recording any activities or conversation. Philosophy also has press the doorbell notification feature will send notification once doorbell pressed with image of who's at the door. This smart door lock equipped with failed attempted and suspicious activities notification features notify owner on mobile device of any failed unlock attempt. UNLOCKING WAYS : 3D face recognition unlocking mode Biometric fingerprint Live video recording Passcode IC Card Mechanical key Mobile APP QR Code direct Wifi Warranty Length: 2Yrs