Features A indicator with two functions: Check the phase sequence and indicate whether the phase is open. Wide voltage testing: The indicator can check three‑phase AC voltage from 60V to 600V, with excellent performance. Easy to use: The LED light can show if the phase is open and it supports buzzer indication. Safe & reliable: Equipped with clips, easy to contact with the terminals and ensure safety and reliability. Portable design: small and lightweight, come with a carrying bag, convenient to take wit h you. 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: SP8030Operating voltage: 60 V~600V three-phase AC voltageMeasurable frequency range: 20Hz~400HzUsing time for continuous measurement:60 minutes maximum at 60V AC4 minutes maximum at 600V ACLED indicator functions:Green for the correct phase sequence, intermittent beepRed for reverse phase sequence, continuous beepItem 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 Indicator3 * Clips1 * Bag Package List