Designed for on-the-go, the Hypersphere Mini is a compact massage-therapy ball that helps to relieve tension and increase range of motion and flexibility.Details Three high-intensity vibration settings Can be used to activate, soothe, or loosen muscles/fascia in the: feet, calves, hamstrings, gluteus, hip flexors, shoulders, back, and forearms The Hypersphere's high-intensity vibration allows you to release tension and targeted areas deeper than a foam roller Dual exterior (silicone grip texture plus dense shell) for optimal sheering Technology Specifications and Features Rechargeable lithium ion batteries give over 2 hours of use per charge 3'' in diameter, ideal size for trigger point release Travel Friendly-TSA approved as carry-on, light and compact 1 year warranty included (See Customer Support for warranty details) Physiological Benefits Behind our Vibration Loosens and releases trigger points or tender area as fast as 30 seconds Can be used to relieve plantar fasciitis, tight hips, tension in upper/ lower back, sore pec, or tight piriformis Significant reduction in pain associated with myofascial release