Extech MP530A True RMS MultiPro High-Performance MultiMeter True RMS autoranging Digital multimeters with RS-232 PC Interface and temperature Function High basic DC voltage accuracy of 0.08-percent Wide AC voltage bandwidth of 40Hz to 20kHz Rugged design with protective holster and water resistant housing Backlit 5000 count LCD display for high resolution (0.01mV, 0.1A, 0.01Ohm, 0.01nF, 0.001Hz)