Features: The SM852B 3 Phase Sequences Rotation Tester ensures accurate phase Sequences and open phase detection with its LED indicator and Buzzers, safeguarding electrical systems from incorrect wiring. Featuring a Small designs , this device is efficient and easy to use, offering precise measurements with operational Voltages Ranges of 60V to 600V and a frequency Ranges of 20Hz to 400Hz. Suitable for electrical engineers, technicians, and maintenance personnel who require reliable phase testing equipment in their professional toolkit. Perfect for power facility inspections, industrial equipment maintenance, electrical troubleshooting, and laboratory research, ensuring system reliability and safety. With double insulated test leads and alligators clip , the SM852B provide fast and accurate result , making it essential tool for any professional dealing with three phase systems. Specifications: Material: ABS Multimeter size: about 80x60x23mm/3x2.4x1inch The length of the probes clip is about 68mm Storage Bag size: about 16x11x40mm Box size: about 170x110x50mm Package Includes: 1 set Phase Sequences Tester note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.