Overview Reviews Product Description Electrodes, TENS, Misc. - Portable Dual Channel muscle Stimulator, complete : Variable pulse: rate 5, 30, 100 (Hz), width 250 (us). Variable ramp time: 1, 3, or 5 S. Variable contraction/relaxation time. Wave: 3-types. Includes carry case, stimulator, lead wires, 4 self stick electrodes, 9V battery, and instructions. Product Videos Custom Field Product Reviews Write a Review Write a Review × Richmar Portable Dual Channel muscle Stimulator, complete Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *