CLINICALLY PROVEN - 94% Patients with long term injury felt immediate relief. .92% Noticed a reduction in the appearance of aged swelling. 89% Saw an improvement after intense workout pain PRODUCT DESCRIPTION Portable Mini Electric Neck Back Massager Cervical Massage Patch Stimulator EMS 6 Modes Muscle Relief Pain Relaxation Shoulder Instrument. FEATURES Small size, light weight, easy to carry and store. 10 modes are adjustable to meet different needs. Massage parts: neck/back/waist/buttocks/legs and other parts.