The muscle massage gun equipped with a 7.4V adapter meaning it charges fast. It is great useful to awake your whole body. 22 speed levels settings meet different body parts needs, great for neck back arm leg muscle massage. The percussion massager is very quiet during working. Great for personal use as well as being one of the best massage devices for professional users, perfect for a physical therapist or chiropractor. Give your consumers something to be excited about with this handheld massage gun.