* One Doorbell can support up to 4 smartphones
* One smartphone can pair with up to 4 doorbells
* Video quality: HD video camera providing 720p HD format with high sensitivity, Up to 30 frames per seconds
* View angle: 140 degree horizontal field of view.
* Video codec: H.264 video stream for monitoring, less than 500 ms video latency on Wi-Fi/LAN
* Night vision: IR LED. Illuminate up to 15 feet, auto on and off based on environment light condition. Built-in light sensor.
* Video setting : brightness, contrast, saturation, gain
* Audio at doorbell side: two-way audio, echo-cancellation.
* Audio codec: PCM, AAC
* Near full-duplex
* LAN 802.3u
* (optional) Wi-Fi 1x1, 802.11 b/g/n
* Camera and/or PIR
* End to end AES
* 802.3af Power over Ethernet
* Relay to connect to gate lock
* RS485 for card reader and key pad
Temperature and Humidity
* Operating temperature : -30 to 50 degree Celsius | -22 to 122 degree Fahrenheit
* Operating humidity : 0% to 90% non-condensing
* Cold start temperature : -22F
* Storage temperature : -40 to +140F
* Size : 3.9”(L) x 3.9” (W) x 1.9”(D)