I couldn't tell you for sure if retail Waterpics have settings dials or not. I don't go near the things anymore, for obvious reasons. When I was in college, I had severe headaches from a wax buildup in my ear and went to the university's health services center to have it cleaned out. I saw them prepping a Waterpic and told them "no way." The doctor said she didn't know how to do it otherwise. I said find someone else who does and proceeded to explain my brother's story to her. She got another doctor.