Completely wireless, the PlayMakar PRO is the ultimate take with you anywhere electrical muscle stimulator system. Comes with 14 programs designed to help build strength, maximize endurance, assist recovery, improve the quality of warm-up, manage pain, and massage away tension in just one device. The PRO Muscle Stimulator was designed to be one of the most convenient and portable muscle stimulators on the market today. Hand control features a backlit display and rechargeability while wireless pods are lightweight and portable for use during or after training. Built for athletes at every level that demand a premium muscle stimulator at a great price. No wires whatsoever. 25 levels of adjustable intensity. 3-5 hours of use time per pod & 5-10 hours on the hand control. Easily wear and conceal your use of muscle stimulation with our wireless pods. The Receiver Pods are 2.35″ in diameter and .55″ in height.