Relieves muscle soreness; The percussion massage gun helps relieve muscle soreness and stiffness with 4 interchangeable head attachments. No noise; Quite during working ,only about 40-50dB, 5-speed settings ranging from 640 to 3,200rpm meet different muscle groups , provide great deep tissue massage. Adjustable intensity; 5 speed levels meet different body parts massage needs great for neck back arm leg muscle .Awake your whole body muscles ,from daily massage to deep massage Long battery life; The massage gun is equipped with a 2600mAh Lithium battery ,lasts from 2-3 hours massage use on a single charge [depending on the massage intensity you use]. charging Lightweight; Only 2. 1 L b; Gross weight 3.3lb with portable carry case, you can take the massage gun everywhere. What's in the box 1 x Massage Gun