This is a convenient pocket-sized, battery powered proving device that produces a 240V DC output. Any device used for voltage detection and for proving dead should be tested before and after use to ensure the safety of the operative. The PD240 current is limited to 2mA and is suitable for use with multimeters and other voltage detectors that have an input impedance greater than 120K. It has a long battery life. Features and Benefits Safely and simply proves the operation of multimeters and voltage testers 240V DC output proving unit Compact size with belt clip Essential for implementing effective safe isolation