The ES-130® is a compact, sturdy, high quality Japanese electro-therapy device that is light weight and fits in the palm of your hand. Featuring a High/Low switch on the back of the unit, the switch is toggled to Low to facilitate use with needles or to High for MEA electro-therapy. It offers three independently controlled output channels with adjustable frequency indicated by a flashing light. The waveform is a unique biphasic pulse which has been designed to minimize electrolysis damage to the needle.