Fluke 117 Electricians True RMS Multimeter VoltAlert technology for non-contact voltage detection AutoVolt automatic AC/DC voltage selection. DC millivolts - Range : 600.0 mV, Resolution : 0.1 mV Low input impedance: helps prevent false readings due to ghost voltage Large white LED backlight to work in poorly lit areas True RMS for accurate measurements on non-linear loads.Operating temperature:-10C to +50C