Power source Battery Powered Colour Grey-12 Speeds Specific uses for product Pain Relief Professional Muscle Massage Gun: Great for personal use as well as being one of the best massage gun for athletes , perfect for a physical therapist and chiropractor. With this percussive massage gun, you can easily massage your muscle groups and deep tissue. Also, it could be nice massagers for neck and back pain relief. 12 Adjustable Speed Levels: Comparing others massagers, CLYLIFE handheld massage gun offers 12 different speed levels up to 3500 rpm. Whether it's a muscle relaxation after exercise or a daily body massage, you can easily find the vibration amplitude that suits you best. 2-6 Hours of Battery Life: Internal 1800mAh battery cells, ,Affordable price, but the battery life is not inferior to other big brands Low Noise: The muscle massage gun uses the newest noise reduction technology that it only reaches 35-45 dB, quiet enough so you can use it at home, gym, office, etc 4 Replaceable Massage Heads: The percussion massage gun offers 4 massage heads to help users relax all parts of the body, great for back massage, neck, shoulders, arms, legs