A vibrating massage ball. 

Powerful yet small, the Hypersphere is an advanced mobility tool that goes beyond the myofascial release than a traditional massage ball. It is equipped with 3 digitally controlled vibration settings with a textured silicone grip and dense shell for optimal use.

Great for improving grip strength, flexibility, range of motion, and circulation. Throughout your warm-up or during your cool-down you can choose your desired intensity setting to help loosen knots or tightness in your hips, hamstrings, gluteus, feet, shoulders and more.

There are two sizes available a regular size and a mini, the mini is great for traveling with as it doesn't take up much space to pack.