RioRand ADM02 Auto Ranging Digital Multimeter DMM DC AC Voltage Current Temp Meter Tester Powered by RioRand Advanced Technology Safety Class: IEC 61010-1 CAT II 600V; Auto ranging DMM, that full scale is 2000 counts Display:3 1/2 digital LCD display Over load protection:Used the PTC protection circuit for Resistance and temperature measurement AC electric field detection function(NCV function)