Feature:1. LED Indicator: This phase rotation meter adopts 5 LED indicator, making the testing results clearer.2. No Battery Required: This 3 phase sequence rotation tester features no battery design, so it can work without battery.3. 3 Test Leads: This rotation tester is equipped with 3 test leads, with the thread design, they can be connected to crocodilian clip.4. Double Insulation: The test leads adopt double insulation, and the length is approximately 700mm / 27.56in.5. Wide Application: This phase rotation meter is used to check phase sequence, widely used in home, factory, and device maintenance.Specification:Item Type: Phase Rotation MeterMaterial: ABSOperating Voltage: 60V to 600V ACFrequency Range: 20Hz to 400hHzContinuous Measurement Time Limit: 60 Minutes for 200V AC and 4 Minutes for 600V ACTest Leads: Double Insulated, 700mm / 27.56in LongProduct 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 xPhase Rotation Meter3 x Accessory1 x BagNote: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.