Doesn't work well. Also, the warranty was only one month. It was only installed a few months after we moved in. I contacted the seller via email with no response. Called Revane and they won't take back and called the number they gave me. No Answer. The guarantee is also one month. I should have returned it a long time ago and shouldn't have kept it because I thought I was doing something wrong. No one wants to settle for calling Revain and having to return something new with decent reviews. It makes a slight hiss with attachments.