- 2.4G Hz WiFi connection, 100% wire-free installation - Built-in rechargeable battery powered and 5V 1A USB cable powered - Support Cloud Storage service for alarm events recording(Not Support Memory Card) - Video call. When visitore press the doorbell, you will receive video call at APP(Only at the APP interface), and receive a notification that APP pushed - Two Way Audio. Built-in Mic and speaker, you can talk with visitor in real-time - Clear Night Vision. Night vision up to 5m. Provide monitoring in day and night - 90 view angle, when someone press the video doorbell, APP will capture alarm events screenshoot - Support indoor chime, when visitors presses the doorbell, a clear indoor chime ringtone can be heard at home - Sharing device. You can sharing the doorbell with your families - Download free APP "Aiwit" from Google Play and Apple Store