Clinical Electrotherapy - Dynatron 120" Stereo Lead Wire, 2-Pin, Red : The Dynatron Stereo Lead Wire is compatible with all Dynatronics equipment that uses the 1/4" stereo plug (non-conductive tip) on one end. The other end has two gold plated .08" pins offering superb conductivity. This wire is a direct replacement for the ones included with the original purchase of a Dynatronics unit. It is advised that lead wires be replaced every six months because of the high voltage transmitted across them. Replace lead wires if your unit is "shocking" patients (spikes in output), the unit is terminating mid-treatment, or if there is no output. This red lead wire is 120 inches long and is sold individually.