reduce cramping. Its ergonomic, curved design and perfectly balanced massage head make for effective use even on hard to reach places. Includes 4 different attachments to adjust massage intensity. Switch to tapping mode to choose from seven different massage actions (light chop, heavy chop, light fist, heavy fist, vibration, wave & pulse) covering all parts of the body, including shoulders, between the shoulder blades and the lower back. There are three pre-programs with variable speed control. With up to 3,100, 4,000 and 5,000 pulses per minute. Perfect handle grip is made out of foam to absorb the vibration to the hand.