Digital Multimeter NCV Voltage Meter with Flashlight Temperature Function for Voltage Polarity Resistant Frequency Continuity Item Type: Voltage Meter Material: ABS Automatic Measurement Range Full Range Overload Safety Maximum Voltage Allowed at Measuring End: 500V (RMS) Operating Altitude: Maximum Approx. 2000m / 6561.68ft Display: LCD Maximum Display Value: 2000 Polarity Indication: Self indication, - indicates negative polarity Over Range Display: 0L or -0L Sampling Time: Approximately 0.4 seconds on the instrument graph Auto Power Off Time: Approximately 15 minutes Battery: 2 x AAA Batteries (batteries not included in shipment) Low Battery Indication: Battery symbol displayed on LCD Operating Temperature and Humidity: 0 to 40℃ / 32 to 104℉ Storage Temperature and Humidity: -10 to 60℃ / -4 to 140℉ Size: Approx. 135 x 45 x 18mm / 5.31 x 1.77 x 0.71in