Advertised as smart sensor that only opens when it is supposed to. I found this not to be true. Opened every time I walked by and also found it difficult to keep the lid open when I wanted it too. Would be nice to have a button like some garbage cans have. Also, I placed the cab against my island counter on the side where the counter top only has the 1-2 inch overhang. If you place the cab against the counter with the lid at full open there is about 2-3 inches between the lid and the edge of the counter. However, when the lid opens it slings beyond the full open position momentarily from the momentum and smacks off the corner of the counter. After a week a permanent line began to develop on the lid of the can and was getting worse each time. I exchanged for a foot pedal operated can and am much happier.