Hand-sized VOM w/ polarity reversing switch The Triplett 3018 (Model 310) Analog Voltmeter tests 18 ranges and functions. AC/DC voltage to 1200V, DC current to 0.6A, and resistance to 20MO. It's drop resistant with a high-impact case. Diode Overload Protected Meter. Fused Resistance Ranges. Single Enclosed Range Switch. 3 Year Warranty. Founded in 1904, U.S.-based Triplett Test Equipment continues to be on the leading edge of specialized testers. Whether supplying vital test equipment to the U.S. Signal Corps during WWII, or providing the railroad industry with essential testers to ensure the safety of their crews and the public, Triplett prides itself in developing innovative, reliable, and durable test equipment for every technician--that also won't break the bank.