3 Phase Sequence Presence Meter Rotation Meter Indicator Detector Meter With LED And Buzzer Tester Phase Indicator 60V - 600V E7CBOOTDTYCouches: Operating Voltage: 60V - 600V (3 Phase AC); Measurement frequency range: 20Hz - 400Hz. It is used to measure the state of the opening phase and sequence by LED and buzzer. An accurate measuring device, powerful, effective, compact and easy to use. Maximum 60 minutes at 60V AC, maximum 4 minutes at 600V AC. Protection level: 2000 V (pulse voltage 4000 V). Do not expose the device to water or other corrosive liquids, and do not place it in an environment with direct sunlight or high temperature and relative humidity, so as not to affect its test performance. Specification: Material: ABS Measurement: About 80x60x2 4mm/31.5x23.6x9.4in Operating Voltage: 60V - 600V AC Three Phase Hold Voltage Limit: 2000V/minute (pulse voltage 4000V)Operating Frequency Range: 20Hz - 400Hz Continuous Use Time Limit: Maximum 60 minutes at 60V AC Maximum 4 minutes at 600V ACComp Volume LED Indicator:Green for Correct Phase Sequence, Intermittent BeepRed for Reverse Phase Sequence, Continuous BeepTest Pen and Cable Length: 80cmPackage Included: 1X Rotation MeterNote: Please allow 1-3cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.