SPY Pipeline Inspection 11994 Paddle DC for 780/785/790INFINITE VOLTAGE SETTING allows you to set the voltage exactly to the level you desire for the coating you are inspecting. Not six settings, not twenty any setting you desire over the complete range of each detector model. Whatever the pipe size, two inches through sixty inches, you have at your control the exact voltage setting required. AUTO REGULATED VOLTAGE keeps your voltage constant! Over a range of two inch through sixty inch pipe the detector