iRobot Roomba Discovery - Model 4220 Vacuum with Charger Plus More! | eBay
iRobot Roomba Discovery 4210 Model - YouTube
iROBOT ROOMBA DISCOVERY MODEL 4211 W/HOME BASE & CHARGER -PARTS ONLY | eBay
My trusty 2006 Roomba Discovery, still regularly cleaning my workshop. I've repaired him several times over the years, and have just replaced some MOSFETs and transistors, but he's still reliable and hard
Best Buy: iRobot Roomba Discovery Bagless Robotic Vacuum Cleaner White 4210
diagnostic mode test of the irobot roomba discovery - YouTube