The latest and most advanced user friendly stimulator. Features a built-in, 0.35" x 1.0" LCD digital meter which displays the frequency. Unit features two grounding plates on the unit (allowing use with either left or right hands) as well as a hand probe with grounding pole and attached wire. Two probe tips are included with unit: ear 2 mm (0.08") and body 4 mm (0.16"). Other standard accessories include 9 volt battery, carrying case, and instructions.