DC digital multimeter with alarm. Displays amperage from -500 to 500 amps and voltage from 0 to 60 volts in 0.01 volt increments. Standard meter operates in negative side of circuit only. Shunt shifter required for positive side. Waterproof face. Programmable sleep mode blanks display for power conservation and 3 levels of display brightness. Includes 500 Amp shunt.