The Fisher Wallace Stimulator is an FDA-approved cranial electrical stimulation system. This unit requires a prescription to purchase. The Fisher Wallace is different from other CES systems in that its leads are sponges, which when damp and placed on either side of the head, act as conductors. This allows the signal to be much gentler than traditional CES units. This unit is intended for use to treat depression, anxiety, fibromyalgia, insomnia, and the like.