Visual doorbell:When someone rings the doorbell, the door lock will make a tinkling sound, and the camera will capture a photo and display it on the phone to ask if the door is opened Cat's Eye:The display screen on the door lock allows for real-time viewing of the outside door, while the situation inside the door cannot be seen through the door lock, improving the safety level Surveillance camera:Normally in a dormant state, when a moving object passes by, the camera is activated through an infrared detector and recorded using video. It is stored on a TF(Supports up to 128g)memory card and can be played back in real-time through the door lock display screen Smart door lock:Using the latest recognition technology, rejecting fake faces such as photos to unlock, automatically recognizing faces two meters away through infrared detection, unlocking immediately after verification, and pushing the door to enter, solving all the troubles of carrying traditional keys, Door opening direction: can be adjusted freely in the door lock system, both left and right are compatible