Electronic AC/DC Voltage Tester, Indicators For Positive & Negative DC Polarity, Tests AC Voltages From 12V To 240V At 4 Useful Levels Aligned With Commonly Used Residential Voltages, Tests DC Voltages From 1.5V To Greater Than 17 To 24V At 4 Useful Levels Aligned With Commonly Used DC Voltages, Bright LEDs Illuminate To Indicate The Type & Level Of Voltage Detected, Built To Withstand A 9.9' Drop, Indicates Polarity When Measuring DC Voltages, Powers Off Automatically After Approximately 2 Minutes Of Non-Use To Conserve Battery Life, CATIII 250V, Class 2, Double Insulation, Ingress Protection IP41 Dust & Water Resistant, Built In Test Lead Holders On Sides Of Tester, Low Battery, Uses 2 "AAA" Batteries, Not Included.