This is a virtual wall that came with the iRobot Roomba 770 set. I am selling it because the main unit broke. Since we didn't need the virtual wall at home, it is in new, unused condition. [Contents] ・Virtual Wall: 2 It seems to be compatible with the 600-800 series besides the 770, but please determine compatibility yourself before purchasing. The second photo is for identifying the main unit, so what I will send is the item in the first photo. Thank you for looking.