The Vintage Hoyt 628 Volt-Amp-Tester is a reliable tool for measuring voltage and amperage in the range of 50-100 amps and 0-50 volts. With the trusted brand of HOYT, this model provides accurate readings for electrical testing in various industrial and business settings. Its durable design and functionality make it a valuable asset for professionals working with electrical systems requiring precise measurements. Tested the voltage side. See pictures. Did not test the amp side.