Details: Treat overworked or tired calf muscles to the soothing vibrations of the cuff massager. Made of cozy polyester flannel, it simply slides over your foot and up onto your calf. Dual elastic bands hold it in place and stretch to fit most. with three-speed power button, you can choose from heavy, mild or light massage. Use it at home or on the road to relax tight muscles or to help ease restless legs. Works great on upper and lower arm muscles, too. Runs on two AA batteries, not included. About 6¼ x 5¼ inches.