This is by far the worst trimmer I have EVER seen. I can't even judge it on performace because the piece of junk broke in my hands as I was using it. I'm serious, as I was trimming my beard the plastic handle was falling apart. When I tried to change heads by twisting off and on even more plastic fell off. It was unbelieveable! Buy any other trimmer but this one. I replaced it with a wahl, much better.