Features: 1.A indicator with two functions: Check the phase sequence and indicate whether the phase is open. 2.Wide voltage testing: The indicator can check three-phase AC voltage from 60V to 600V, with excellent performance. 3.Easy to use: The LED light can show if the phase is open and it supports buzzer indication. 4.Safe & reliable: Equipped with clips, easy to contact with the terminals and ensure safety and reliability. 5.Portable design: small and lightweight, come with a carrying bag, convenient to take wit h you. Specification: Model: SP8030 Operating voltage: 60 V~600V three-phase AC voltage Measurable frequency range: 20Hz~400Hz Using time for continuous measurement: 60 minutes maximum at 60V AC 4 minutes maximum at 600V AC LED indicator functions: Green for the correct phase sequence, intermittent beep Red for reverse phase sequence, continuous beep Item Size: Approx. 85 x 64 x 23mm / 3.3 x 2.5 x 0.9in(Excluding test wire) Weight: Approx. 240g/8.5oz Package list: 1 * Phase Indicator 3 * Clips 1 * Bag .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1A indicator with two functions: Check the phase sequence and indicate whether the phase is open. 2Wide voltage testing: The indicator can check threephase AC voltage from 60V to 600V, with excellent performance. 3Easy to use: The LED light can show if the phase is open and it supports buzzer indication. 4Safe & reliable: Equipped with clips, easy to contact with the terminals and ensure safety and reliability. 5Portable design: small and lightweight, come with a carrying bag, convenient to take wit h you.