Just bought this osim hand held massager, my shoulder and back is killing me! Have to hold by myself this is one of the disadvantage. It claim that it comes with soothing Heat and rejuvenating Ions Therapy that delivers soothing relief to aching muscles. Ions I cannot see , other then that, it definitely relieve my shoulder and back pain. I felt much more better. Hope that they can invent somewhere to hook to so i dont have to carry it by myself if not very tiring.