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 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 Meter3 x Accessory1 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.