The E-Stim II is the most economical and easy-to-use portable electro-therapy unit. New dual channel, portable, continuous frequency unit features Milli-amp (normal current) and Micro-amp (micro current) settings. Each channel also includes its own green LED light which displays power-on and frequency. Accessories include 2 sets of alligator clip wires, 9 volt battery, and instructions. Measures 5” x 3.4” x 1”.