iRobot Roomba i7 vs Roomba i7+: What's the main Difference?
iRobot Roomba i7+ Review | Reviews by Wirecutter
Roomba i7+ vs. i7 vs. e5 | Modern Castle
Roomba i7+ vs. i7 vs. e5 | Modern Castle
New iRobot® Roomba® i7+ Robot Vacuum Learns a Home's Floor Plan and Empties Itself
Amazon.com - iRobot Roomba i7+ (7550) Robot Vacuum with Automatic Dirt Disposal - Empties Itself for up to 60 days, Wi-Fi Connected, Smart Mapping, Works with Alexa, Ideal for Pet Hair, Carpets,