1200rpm for light warm-up, suitable for warm up before exercise 1600rpm for deep muscle relaxing, proper relaxing for muscle stress 2200rpm for muscle recovery, suitable for post exercise 2800rpm for precise deep massage, precise massage for deep muscle soreness 3300rpm for professional massage, professional massage brings the best muscle pain relief 10 minute over-use protection, avoiding muscle hurting caused by over use. Fast charging, shorter charging time and longer using time. Longer using time, better to relieve from muscle soreness Warm-up Mode: interval massage to activate your muscles, light beats to arouse your energy. Muscle Relaxing: medium beating to relieve from muscle soreness after exercise Deep Massage: Deep into inner layer of muscle, precisely and effectively relieve from muscle stress with massage heads 26V high power brushless motor, providing best vibration strength in highest level, whilst sound under 55db will not bother you. 10mm vibration depth will deep into the point of muscle soreness. Along with bullet head, you will experience a more precise muscle pain relief to recover from tiredness. The thick handle is covered with skin-friendly material, providing a comfy handling. The strong friction makes using more comfortable and muscle pain relief more efficient, bringing a better effect. 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.