Amazon.com - iRobot Roomba i4 EVO (4150) Wi-Fi Connected Robot Vacuum – Now Clean by Room with Smart Mapping Compatible with Alexa Ideal for Pet Hair Carpets & Hard Floors, Roomba i4
Roomba j7+ Review - 7 Real World Cleaning Tests
Costco shows an i4 robot to compare with the i7+ on its site. The link to the actual listing for the i4 does not work though. It appears that the i4 somehow