"Alybell WiFi Video Doorbell connects to network via Wifi router. Mobile devices including smartphone or Tablet, can connect to the doorbell. After the visitor rings, mobile devices could interact with doorbell via real time video and audio, unlock, take photos, take videos, and warning. P2P cloud service could push messages of visitor calling and alarms. This product has capabilities of anti-removal alarm, infrared night view. Manage your doorbell with the Alybell mobile app Answer video calls, chat with visitors, receive alerts and power up your video camera from your phone (app download required). The Alybell smart video doorbell that lets you answer the door from your smartphone, allows you to see, hear and talk to your visitor from an iOS or Android mobile device with Wi-Fi or 3G/4G coverage.¨C anywhere in the world! The AlyBell wifi doorbell is the use of wireless technology (WIFI) developed out of a doorbell. Wireless doorbell wiring is not required, Installation is simple and flexible, voice intercom or visual voice intercom, monitor, camera and unlock functions."