4 Interchangeable Attachments Cylinder Head, U Head, Flat Head, Globe Head 6 Intensity Levels Have the power to control pressure concentration with a 6-gear selection. Percussion Therapy Help alleviate post-workout tightness and stimulate muscles with 4 distinctive massage heads. Rechargeable Battery Wireless operation, lightweight design, and rechargeable battery make for easy portability from the gym to the hotel room.