40th Anniversary Model. Limited time at a reduced price. Only while stocks last. The bipolar voltage tester is a portable testing device for determining and displaying the voltage status of low-voltage electrical circuits. It is used to display DC and AC voltages in the range of 12 to 400 V as well as the polarity by applying two poles. The voltage ranges are displayed in 7 steps. The displays for the valid limit values for dangerous touch voltage of 50 V/AC or 120 V/DC are provided.