Features 1. Targeted relief of stress: This is very helpful for tremors, Parkinson's rigidity, arthritis, Dupuytren's contracture, or other diseases. Release hand pressure through scientific speed and frequency vibration. 2. Multi scene rehabilitation assistance: spherical texture grip mode and suspension ring design - ideal for elderly people, patients with finger cramps and tremors. Helps reduce tremors, morning stiffness, and stress-induced tremors 3. Long lasting recovery effect: This therapy ball adds 4 types of vibration and therapy functions, allowing you to choose the best vibration mode for rhythmic absorption and release. After 15 minutes of treatment, the effect can last up to 4 hours. 4. High quality and durable: Our vibrating massage ball is designed to be lightweight and easy to carry. The IPX6 waterproof structure can be used normally during dining, work, and outdoor activities. Reduce handshakes, relieve stress, make daily work easier, and make life better 5. Multi purpose friendly design: The ergonomic palm sized sphere is perfect for the entire palm, and its sturdy and elastic structure allows you to grip it tighter. Appropriate daily training can help reduce hand tremors. Hand exercise balls are also the best gifts for parents, lovers, and friends. Specification Ball size battery capacity: 1200mAh Single size: 76 * 76 * 97.5mm Individual weight: 193g Big ball's battery capacity: 1500mAh Individual size: 95.5 * 96.5 * 124.3 mm Individual weight: 395g Usage noise: 55 decibels Product Material: Silicone+ABS Usage duration: Maximum 90 minutes (6 cycles), 10 minutes per cycle, the above is the playing data. Packaging content: Yoga ball/instruction manual/charging cable Package Include: Rechargeable Vibrating Massage Ball instructions Charging line