Experience a really devious play session... An instrument used in 'power exchange' or submission/domination experiences and just devious enough in its intended purpose The Power Exchange Vibrating Sound by Master Series has astounding potential! This sound has just enough vibrational power to offer a sensitive mind blowing feeling. For even more varied stimulation The Power Exchange Vibrating Sound can also be used as a pinpoint vibrator, with all the fun and exploration that entails.