The Smart Massager (known as Massage gun) is a portable device that can massage your muscles everywhere. You can use it to relieve muscle stiffness, pain, and ease fatigue, and quicken blood circulation by its 4 different massage heads and 5 different hit level to make the soft tissues of your body healthier. The Smart Massager guns are just 415g net weight and small size as iPhone 12, which are easy to portable and using. For 3 hr charging may use up to 3 days. , , For safety reasons, the Smart Massager gun will automatically switch off after 10mins running.