Designed for accuracy and simplicity of use. No switch or dial to press. Simply position probe tip around target area and hold or press it down as show in the below photos. White Stick for finding landmarks, 0 point, Sciatic and Vertebrae points (See BC-566 book on p. 79). Works well for both ear and body points. Point detection is signaled by light. Rapid flashing of light indicates close proximity to the point. Steady green light indicates a point has been located. Unit includes 1 each of point finder, white stick, ear probe tip, body probe tip, detachable hand-held probe, 6V battery, and protective case.