Specification: Item Type: Phase Rotation Meter Material: ABS Operating Voltage: 60V to 600V AC Frequency Range: 20Hz to 400hHz Continuous Measurement Time Limit: 60 Minutes for 200V AC and 4 Minutes for 600V AC Test Leads: Double Insulated, 700mm / 27.56in Long Product Size: Approx. 85 x 64 x 23mm / 3.35 x 2.52 x 0.91in ( Manual Measurement, Slight Error May Exist ) Weight: Approx. 225g / 7.94oz Package List: 1 x Phase Rotation Meter 3 x Accessory 1 x Bag Note: Cannot be used as a voltage detector A phase may be present even when all orange leds are turned off during an open phase check. Disconnection and phase sequence can be checked by LED and buzzer. Features LED Indicator: This phase rotation meter adopts 5 LED indicator, making the testing results clearer. No Battery Required: This 3 phase sequence rotation tester Features no battery design, so it can work without battery. 3 Test Leads: This rotation tester is equipped with 3 test leads, with the thread design, they can be connected to crocodilian clip. Double Insulation: The test leads adopt double insulation, and the length is approximately 700mm / 27.56in. Wide Application: This phase rotation meter is used to check phase sequence, widely used in home, factory, and device maintenance.