No wires and cables are required, just download the app, then connect it to your doorbell, keeping your doorbell always online, you can see, hear and speak to anyone at your door with clearly camera in wide-angle lens without noise. Both for android and ios. Detecting the slightest motion in front of the door. Get instant alerts when visitors press your doorbell or trigger the built-in motion sensors. Equipped with ir sensor and led, day or night, rain or shine. This smart video doorbell adopts ultra low power technology, it can work regularly for about 6-10 months in standby mode with two 18650 batteries. 2 ways to record the video, free cloud storage and a sdd card(not included). The video will be automatically stored in the cloud firstly and then stored in the card. It is enough for normal use. Package included 1 x video doorbell, 1 x indoor chime, 1 x install accessories, 1 x english user manual.