Up to 270V test voltage Microcontroller technologies, front panel voltage meter indicates test peak open circuit voltage and polarity. Output voltage and polarity are controlled manually from the front panel Ergonomically designed for safety, speed and efficiency Cables, manual and calibration certificate included External interlock disables HV output and defeats test when circuit is open Optional USB Testminder, computer control Optional Resistor network of Fig. 110 One year calibration cycle One year warranty