ProCare® Wrist Support, One Size Fits Most, 1 Each Ladies' 15 20 Knee Highs Relieves pain and improves muscle Undercast Padding Relieves pain and improves muscle performance * System is a battery operated wireless pulse generator that sends electrical impulses from a remote control to a receiver (round disk) with electrodes attached to them that are placed on the body to stimulate the nerves causing pain * Wireless remote controls the On Off Intensity and Mode functions of the receiver Designed to promote proper posture and good body mechanics to help maintain a healthy back * Can be used while lifting pushing pulling walking exercising and repetitive bending or twisting * Size Md Lg fits waist circum Made of nylon One size fits most