The build is plastic and light. I thought this was another health product gimmick. It took about 4 days of using once a day and my bleeding gums stopped. You just have to get your own system of not making a water mess and start on a low setting. for my 4 day example, i used setting of 2 first day, 4 2nd day, 6 on the rest of the days. Not bad. you will see results with regular use.