Unlike Ring's cheaper doorbells, the Ring Video Doorbell Pro doesn't have a battery backup, which means you need to connect it to a traditional doorbell or other compatible power source within your home. As with Ring's other doorbells, you can get excellent smart home options and cloud video storage for as low as $3 a month. Read the full reviewLatest News and Updates January 2019Several new smart doorbells have been announced or released:Arlo Audio Doorbell This audio only unit works with Arlo cameras. Released in October 2018 for $80Blink Video Doorbell Blink is an Amazon owned company, so we’re interested to see how the Blink compares with Amazon’s other video doorbell brand, Ring. Announced in December 2017 for $99Gate This smart lock comes with a built in video doorbell. Released in October 2018 for $349SimpliSafe Video Doorbell Pro This doorbell can be used with or without a SimpliSafe home security system.