Now with an 11 speed motor control from 1,000rpm to 3,700rpm for maximum comfort and control. This is the most powerful hand held electric massager available in the USA without a license. Designed for therapeutic and clinical use, this massager is at long last available for home use in the USA WITHOUT A LICENSE! This massager offers the ultimate massager experience for anybody who spends a lot of time on their feet or experience severe foot and leg pain. This massager is an important tool for stimulating local circulation, easing muscle tension and alleviating joint pain and swelling. The ergonomic design is no accident. The foot pad had been designed at the optimal angle for most comfort whilst massaging.