Looks in great shape but I have no idea how to test this. The Multi-AMP CS-7B Relay Test Calibrator is a reliable tool designed for testing and calibrating relays in electrical systems. With the ability to operate at 120/208/240V, it provides accurate and efficient performance for professional use. The Multi-Amp brand ensures quality and durability, making this calibrator a valuable asset for businesses and industrial settings requiring precise electrical testing and inspection. Buyer adds fedex shipping