Horizontal design provides an improved ergonomic fit on belt. Easy and convenient “Flip Down” control panel and battery cover reduces cover loss or damage. Dual isolated channels. Pulse frequency adjustable 2 -150 Hz. Pulse width is adjustable from 60-250 micro-seconds. Wave form: asymmetrical, bi-phase, square pulse. Modulation selector offers wave delivery in Normal, Burst or Modulation modes. Plastic belt clip. Comes complete with carrying case, 2 lead wires with deluxe connector, 9-volt battery, 1 package of 4 pre-gelled electrodes and operating manual. 3 Year Limited Warranty. Adjustable 0-80 mA, 500 ohm load.