1. Auto power off, the conductor to be measured is 12V. 2. Phase rotation test. Continuity test with buzzer and LED indication. 3. Low battery indication and over voltage prompt 4. Flashlight. Test live voltage without batteries 5. Buzzer and silent modes available. Auto range. Polarity indication Product Model:UT18D Voltage and Continuity Tester Product Introduction: Waterproof, voltage and continuity testing series products: If your working environment is dark, humid, rainy, and requires a high level of testing safety, The voltage and continuity testing series products are your ideal choice. Sudden transient overvoltage can cause harm to workers. IP65 waterproof rating, built-in lighting, RCD testing, phase rotation testing and other functions are sufficient to cope with Maintenance and troubleshooting requirements in various harsh environments. UT18 series are designed for testing AC/DC voltage, 3-phase voltage, phase sequence, continuity, and more. This series is categorized as CAT IV 600V and meets IP65 standard. These voltage testers are perfect tools for electricians to quickly measure voltage levels in all environments. This series should NOT be used with 110V electrical systems. 100% New Type:Voltage and Continuity Tester Specification:UT18D Colour:As Shown Material:ABS Package Contents: 1 x Voltage and Continuity Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.