INTERCHANGEABLE SPHERES You will have separate spheres that allow you to customize the strength of your massage experience. Included in the package is one set of grey (soft) and black (firm) spheres. VERY QUIET AND COMFORTABLE TO USE - Virtually no kickback to the hands and arms so you can massage for longer without the pain or discomfort. Very quiet for a peaceful and pleasant massage therapy experience.Relieves stress, muscle fatigue, and reduces pain. LIGHTWEIGHT, POWERFUL & DURABLE Variable speed control from 20 to 40 pulses per second. Manufactured in Canada with quality components and weighs only 3lbs (1.4kg). The 12ft (4m) cord allows you to be in a comfortable position and maneuver with ease. This item is in the category "Health & Beauty\Massage\Massagers". The seller is "stantonpartners" and is located in this country: US. This item can be shipped to United States.