The Hyperice Vibration Massage Ball "Hypersphere": With its robust rubber surface, the Hyperice Vibration Massage Ball "Hypersphere" impresses with its ease of use. The on/off switch also allows for speed adjustment, thus varying the intensity. LED indicators display the battery status and speed level. If the LED lights up red, the vibration ball needs to be charged with the included charging cable. The textured rubber surface ensures a secure grip on the body and on smooth surfaces. The ergonomic size and shape of the vibration massage tool also allow access to hard-to-reach areas of the body. Areas of application: back, hips, arms, buttocks, shoulders, feet, thigh, and calf muscles. Material: rubber • Surface texture: textured • Color: black • Diameter: 12.5 cm • Weight: 980 g.