The EMS unit is designed for personal use; however, it is strong enough to be used in an office setting. The EMS uses very weak electrical impulses to contract and relax muscles. It produces "passive" exercise by sending electrical impulses or signals to the selected muscle or muscle groups to contract and relax them. The EMS can relax a "tense", "tight" or spasmodic muscle. Common candidates for EMS include those in high stress situations who experience muscle tension in the upper back and neck areas, and those who suffer from chronic tension headaches. The EMS will increase motion, range and response of muscles restricted from disuse or from atrophy from another cause. It is helpful following activity restrictions, such as after surgery or being in a cast. It is also helpful at increasing local blood circulation. The EMS is portable and may be clipped to a belt, shirt, pocket, bra or other clothing.