The Pursonic KTR230 is your personal Massage Therapist! It is a wearable trainer that was specifically engineered to contract your abs and other specific parts of the body, just as you would experience in a regular workout. Features: The high tech low frequency pulse relieves muscle pain while stimulating the muscle. Five (5) modes and ten (10) intensities to choose from Use on all areas of your body; arms, abs, waist, neck, back, and more Wearable during moderate activity Wireless freedom to move around while receiving massage Requires one (1) CR2032 battery (2 included) Do not use if you have a pacemaker without direction from physician Can be used as a massager and also for fitness