Two percussion frequency levels to dial in just the right massage intensity to relieve localized aches and painsTwo massage attachments with which to focus or diffuse the massage experienceLong handled design to allow user to reach hard to reach troubled areas on upper and lower back as well as upper and lower legsBenefits of Percussion Massage Include:Stimulates blood flow into areas massaged thereby aiding in the recovery of damaged and stiff musclesBreaks up lactic acid that can build up in tense muscle areas (lower, upper back, neck) and reduces stiffnessRelaxes and reduces tension thereby reducing mental stressIBWPM100