This dual digital panel meter measures and displays both voltage and current , ideal for your laboratory DC power supply. It includes two 4-digit 0.7" high LED readouts. It can measure DC voltages from 0 to 99.9V (resolution of 0.1V) and DC currents from 0 to 5.00A (resolution of 10mA). Supply voltage: 5VDC (Regulated) / 500 mA - recommend RPR-051A5-P5 (not included)