Percussion techniques help to relax the feet, calves, shoulders, neck, back, muscles, arms and legs. Powerful motor and safety design: Powerful motor, up to 3600 cycles per minute. It will stop automatically after 20 minutes to prevent the massager from overheating. Portable and flexible: Hand-held and cordless design that you can take to your home, office or anywhere. 5 interchangeable head attachments, depending on your preference. Cordless, rechargeable. The built-in rechargeable battery lasts for about 140 minutes after being fully charged! For safety reasons, do not use while charging. It is an ideal gift for men, women, parents and friends.