C is the worst purchase I have ever made on amazon. Whenever I run before work, I found in the room (starting point) on returning systematically with an error message: full tray while I emptied my field of vision is blocked then it is in the middle of an empty room, dirty sensors while it is dry before use .... Choice. Anyway, it has nothing drawn and more battery power is HS. So I have to vacuum myself with my bagless vacuum ... I bought it to save time, nice idea .. !!!! In addition, when I put in the market by being present (it should be back for the restart of an error message appears), it does not bcp aspires, it is not over and is extremely noisy: the fan made so much noise that a chainsaw, impossible to move in the presence of my baby, that is systematically awakened by the sound .... In short, for the price it's a ripoff. My mother bought one, unmarked, 3 times cheaper, it works!