If you've been thinking about adding a smart doorbell to your home, then Amazon's latest deal may tempt you. The company is currently offering a free Echo Show 5 smart display to people who buy a Ring Video Doorbell 2 or Video Doorbell Pro through Amazon.com. Prime subscribers can save an additional $40 off the Video Doorbell 2 and $50 off the Video Doorbell Pro, making them $159 and $199 respectively. Otherwise, the two devices will set you back $199 and $249. The Echo Show 5, meanwhile, currently costs $89.99.