1.No wires and cables
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 in 166° wide-angle lens without noise.
2.Android and iOS Compatible
Compatible with both, iPhone and Android devices. Download your app at iTunes store, or Google play.
3.Real-time See/Hear/Speak
Offer Two-way audio communication. See, speak and hear through the app from your phone wherever you are. Stay connected with your visitors at any time by two-way real time talk, build in microphone and speakers are decent for your conversation.
 4.PIR Detection and Smart Night Vision
Detecting the slightest motion in front of the door. Low, medium and high sensitivity for you to choose.
5.Low Power Consumption Smart Doorbell
The Smart Video Doorbell is powered by 3 x 18650 batteries (NOT included).

Descriptions:
High definition video make the communication more clear.
Long distance signal transmission, support mobile phone real time monitoring.
Easy to install with mounting kit.