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On smartphones, the company generally uses two sensors to accomplish more accurate depth perception while other companies have used a similar setup to attain more accurate facial recognition features. The latter of those could be the reason for two cameras to be used here since that would enable any AI driven features based on that to work more effectively. The inclusion of full color renders, meanwhile, seems to suggest this product is actually significantly far into development rather than only existing as a concept — although that could turn out not to be the case. Editor's Choice: Ring Video Doorbell 2The Ring Video Doorbell 2 has excellent video quality, supports a wide variety of smart home systems and its user friendly design can be mounted on any surface outside your home. VIEW DEAL ON The Home DepotTop Ten Reviews has reviewed video doorbells since 2015 and spent over 150 hours researching and testing seven popular models from five manufacturers. To determine the best video doorbells, we looked at a variety of factors such as video quality, usability, installation and features both standard and unique.