1. Dual-function indicator: Check phase sequence and indicate if phase is open. 2. Extended voltage test: The indicator can check three-phase AC voltage from 60V to 600V, with excellent performance. 3. Easy to use: The LED indicator can indicate whether the phase is open and it supports buzzer indication. 4. Safe and reliable: Equipped with clamps, contact with the terminals is easy and guarantees safety and reliability. 5. Portable design: small and lightweight, comes with a carrying bag, convenient to take. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.