Check the listing for details. UNI-T UT18D Voltage Continuity Tester 6V-690V Auto Range RCD Tester Backlit IP65. Condition: New. Listed at 58.42 USD. UNI-T UT18D Voltage And Continuity Testers Auto Range Volt Detectors Pen LED/LCD Display UT18D can provide AC and DC voltage (including the three-phase alternating current) measurement, phase of three-phase AC power indicator, on-off test, RCD Test, single pen measurement (can determine the zero line or wire), self checking and other functions. Suitable for: smelting, electronics, manufacturing, defense, electric power, petroleum, chemical industry. More detailed product information, please refer to the English manual. Features: Auto Range LCD Backlight Date Hold RCD Test Phase Rotation Test Single Lead (L2) Voltage Detection Self-inspection Polarity Detection High Voltage Indication Low Battery Indication Auto standby Silent Mode Work Light Specifications: ParameterSpecificationsRangeBest AccuracyModel UT18DLED AC/DC Voltage Indication (V)12V8V±2V24V18V±2V50V38V±4V120V92V±6V230V174V±8V400V320V±10V690V550V±15VPhase Rotation TestOperating Voltage: 100V~690V√ Frequency:50Hz~ 60HzSingle Lead(L2)Voltage DetectionOperating Voltage:100V~690V√ Frequency: 50Hz~ 400HzContinuity TestResistance: 0~100KΩ√ Beeper and LED light IndicatorRCD TestOperating Voltage:230V(50Hz~400Hz)√ Polarity DetectionPositive & Negative√ Self-inspectionAll LED or LCD indicator√ FeaturesIP65 √ Auto RangeAll Range√ Exceed VoltageVoltage Range:713V~788V√ Auto standbystandby current