I used it about 2-3 times a month, so it was mostly left unused. The main unit is almost clean, I think. It works without any problems. I will clean and disinfect it before shipping. I confirmed its operation for 20 minutes. Please understand that this is a used item before purchasing. iRobot Roomba i2, a circular robot vacuum cleaner with Wi-Fi connectivity. - Brand: iRobot - Model: Roomba i2 - Features: Wi-Fi connection - Color: Black - Shape: Circular Thank you for viewing.