Tired of muscle pain?? The interchangeable heads in 6 shapes target specific muscle groups for faster recovery; easy and quick to remove and affix massage heads in seconds. With an auto shut-off after 15mins of continuous use, the massage gun is protected against overheating. The high-torque motor produces 1400 to 3200 strokes per minute to reach tissue as deep as 12mm to increase blood flow for effective post-workout muscle relief. Helps for relief of tight muscles.