iRobot i7+ vs. 980 vs. 960: Roomba Comparison Review
iRobot Roomba I7 + vs. iRobot Roomba 980: full specifications | GearBest Blog
Roomba i7+ vs 980 - Detailed Comparison Plus a Money Saving Tip
Amazon.com - iRobot Roomba 980 Robot Vacuum-Wi-Fi Connected Mapping, Works with Alexa, Ideal for Pet Hair, Carpets, Hard Floors, Power Boost Technology, Black (Renewed) -
iRobot Roomba i7+ review - a robot vacuum with surprising features