Voltcraft vc 820 1 digital multimeter 4000 counts cat iii 600v voltcraft vc820 1 the voltcraft vc 820 1 digital multimeter is a multifunctional test meter that will provide consistent and accurate measurement of ac and dc voltage ac and dc current resistance capacitance frequency and will also act as a diode tester and continuity checker voltcraft vc 820 1 digital multimeter 4000 counts cat iii 600v