Everyone from professional athletes to recreational gym-goers to those with chronic pain love this powerful massager for many reasons: Percussive therapy can help muscles recover faster, reduce muscle pain and lactic acid build-up, improve range of motion and flexibility, encourage blood flow, and more. 1 Button Control- For ON/OFF and speed switch, simple convenient. 4 Hours Run Time- Energy-saving, can use longer per full charge. 4 Levels of Speed- Able to meet different levels of myofascial massage. 15 min Auto-Off- Avoid overuse and overheat, ensures your safety. Less than 35db - Low noise, ensures you a quiet and comfortable environment. More-High powerful brushless motor, Ergonomic, and sweat-proof handles,4Replaceable massage heads. Package: 1x Massage Gun 4x Massage Heads 1x Charger 1x User Manual.