Want to relax after a busy day at the office? Want to relax your muscles after exercise? Want to relieve back pain in your free time? As a professional muscle recovery tool, our massager will be your best choice. Notes: Please charge the massager before use. Do not use the massager while charging. Do not massage bones as this may cause injury. Please do not work continuously for more than 1 hour. Do not soak in water. Keep away from liquids or heat sources. Keep the ventilation holes free of dust and debris. Do not remove or attempt to remove screws. If any adverse reactions occur, stop using immediately.