I have7 Roombas...4 in use now mine all came with parking chargers...meaning when they are finished with the room, they return to the base to be recharged. Only one of mine has a clock/ calendar on board ...you set the days and the times that you want it to run. It comes w/ virtual wall scheduler that sets auto when you set the Roomba. I think it is
the 600 series, but I've had it several years. [ATTACH=CONFIG]567341[/ATTACH]It it talks. and tells you to clean, or object in the brushes. I had a 500 that son took it. The others are the 400 series and I have virtual wall and remote scheduler. These let you use the remote to set time & day, and you have to "aim" at the virtual wall also. I love my robots..I don't like replacing battery-- they are abt $25-30 at eBay, but a lot more at iRobot. Yes, rug fringe is a problem...I got rid of mine. They climb other rugs easily.