Ring Video doorbell pro features an ultra-slim design and customizable faceplates. It has a dimension of 5.05-Inch x 2.50-Inch x 1.08-Inch. It has a voltage rating of 16 - 24-Volts AC at 2.4 GHz, 5 GHz and withstands a maximum temperature of -20 to 48 deg C. This doorbell offers 1080HD video, two-way audio and customizable motion sensors for excellent ring experience. It sends instant alerts to your smartphone, tablet or pc and ring app protects and monitors home from anywhere. This doorbell with 160 deg viewing, offers 1080p HD video, night vision and supports 802.11 b/g/n Wi-Fi connectivity.