I bought this same unit new($29) back in the 80s. When it wore out I could not find any wand vibrator to match its power and penetration. The motor is built to last (mine gave up the ghost after 30 years of use. It appears to use a larger heavier weight than can be found in present day vibes. Nobody is willing to put a variable speed controller in the vibrator anymore only HI MED and LO switch. In short they don't make them this good anymore.