Two percussion frequency levels to dial in just the right massage intensity to relieve localized aches and pains -Two massage attachments with which to focus or diffuse the massage experience -Long handled design to allow user to reach hard to reach troubled areas on upper and lower back as well as upper and lower legs - - Benefits of Percussion Massage Include: -Stimulates blood flow into areas massaged thereby aiding in the recovery of damaged and stiff muscles -Breaks up lactic acid that can build up in tense muscle areas (lower, upper back, neck) and reduces stiffness -Relaxes and reduces tension thereby reducing mental stress - PM100