This is a complete clinic in your hands. Modern, hand held, 6.5" long unit offers sensitive acu-point or trigger point location and stimulation. Location and stimulation are independently adjusted with two separate control dials. The pulse frequency is fixed at 10 Hz. A flashing light and sound indicate when point detection is made. The spring activated detection probe allows a uniform pressure when searching. The grounding circuit is made by holding the metal plate on the side of the unit or with the hand grounding pole. Accessories include 2 probe tips (ear 2 mm 0.08" and body 4 mm 0.16"), hand grounding pole with attached wire, 9 volt battery, carrying case and instructions. It identifies the point to apply spot magnets (sold separately). Specifications: 500 ohm test load Frequency: 10 Hz (fixed Volts current: 0-25 bolts, o to 50 milliamps Pulse width: 220 microseconds Pulse shape: asymmetric biphasic square wave Pulse modes: continuous Pulse detection: sound and light indication Freq indicator: flashing green light Power source: 9 volt battery Size: 6.5"x1.3"x0.9"