The HyperIce HYPERSPHERE soft tissue vibrating massage ball is used by some of the world's best athletes to warm up and recover from training or competitions - and for good reason. This travel-sized massage ball features high-intensity vibration to aid in soft tissue massage, enhanced recovery, increased flexibility and better localized massage therapy. It's a lightweight tool members can utilize before or after a workout so muscles are properly stretched. The HYPERSPHERE is unique because it can soothe hard-to-reach muscle pockets a traditional foam roller cannot, like between shoulder blades and in the hip. With digital circuitry controls featuring 3 speed settings, the frequency and intensity of the HYPERSPHERE can be adjusted to suit your members' needs. A textured rubber exterior targets the vibrations where they're needed the most and your members can adjust location mid-use simply. Use the HYPERSPHERE on the back, hips, glutes, shoulders, feet, hamstrings, or other concentrated areas that need relief. A rechargeable lithium ion battery gives the HYPERSPHERE over 2 hours of use per charge. Charger is included.