Function: 1. Highly reliable, can check a large range from 60V to 600V AC three-phase. The instrument guarantees high reliability and efficiency. 2. The appearance is exquisite and beautiful, small size, lightweight, with carrying bag, portable, easy to carry and use, 3. 5pcs LED LEDs light up to indicate, the test result is clear at a glance. Fast and accurate measurement, efficient, effective. 4. Environmentally friendly design, no need for batteries. The Limit of continuous use time is 60 minutes at 60 V AC and 4 minutes at 600 V AC. 5. The measuring cable is double insulated and safe to use. As a general measurement tool, it is widely used in schools, laboratories, families and other fields. Specification: Item Type: Phase Sequence Meter Material: ABS Kolor: as shown in the figure Product Model: SM852B Operating voltage: 60 V ~ 600 V AC, three-phase Auxiliary voltage limitation: 2000 V/min Operating frequency range: 20 Hz ~ 400 Hz Continuous use limitation time: Maximum 60 minutes at 60 V AC, Maximum 4 minutes at 600 V AC Measuring cable: Double insulation Measuring cable length: approximately 70 cm/27,5 inch List of packages: 1 x Phase Sequence Meter 3 x Crocodile Clamp 1 x User Manual 1 x Storage Bag