No matter the sport, the Sport Elite Muscle Stimulator Kit allows you to tailor your training program to help athletes achieve peak performance. Designed with 9 programs and 5 levels of progression for competitive/high performance athletes, this portable muscle stimulator provides a substantial range in strength. The machine?s Endurance and Resistance programs develop slow-twitch and fast-twitch muscle fibers, helping athletes build stamina for long-duration aerobic activities. Signals are sent to nerves in the muscles, contracting them and promoting increased muscle mass when used in conjunction with a strength training program. Whether it?s a pre-workout treatment, training session or recovery period, the Compex Sport Elite Muscle Stimulator is equipped with the programs you need to provide athletes with a competitive edge. Kit includes: Sport Elite Muscle Stimulator, Battery Charger CD with User Manual, Electrode Placement Guidebook, Carrying Case, Easy Snap Electrode Lead Wires, 2? x 4? Easy Snap Electrodes and 2? x 2? Easy Snap Gel Electrodes.