Important Note: 1. DO charge the massager in "OFF" status (at the bottom of the massager), or the battery can't be charged at all. 2. Please charge the massager every 2 months for 6 hours if you don't use it for long. 3. Please DON'T USE while charging. 4. Please massage it with less pressure if you feel hard. Choose your desired speed based on muscle group and your own preferences (20 adjustable speed level, ranging from 1200 to 3200 percussion/mins). 10 mm amplitude provides deep muscle relief and overall recovery, decreasing pain and increasing range of motion. 1-20 speed display allows you to easily view the massage intensity in real-time. 1-10 power level display so you know when to charge the device. Easy touch design for On, Off, increase, and decrease buttons. 2500mAh rechargeable lithium-ion battery lasts about 6 hours with only a 1.5 - 2 hour charge. Use it in the home, gym, or office. Equipped with vents on both sides and on top, the massage gun has an expanded heat dissipation area, increasing its product life. You don't need to worry about overheating even if you use it for a long time. The 5th generation ultra-low damping technology is equipped with an aerodynamic noise reduction shell, rear motor filter, and sound insulation plate. It is quieter compared to competitors. Massage gun grip has a silicone cover, which provides a sturdy grip that won’t slip. Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.Disclaimer: While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer. Content on this site is for reference purposes and is not intended to substitute for advice given by a physician, pharmacist, or other licensed health-care professional. You should not use this information as self-diagnosis or for treating a health problem or disease. Contact your health-care provider immediately if you suspect that you have a medical problem. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition. Amazon.com assumes no liability for inaccuracies or misstatements about products.