🔌 Power Up Your Testing Game! Fully insulated alligator clips ensure secure connections. Magnetic back cover allows for hands-free operation. Compatible with 45 to 65Hz frequency ranges. Easily identify phase orientation with LED indicators. Test across a wide input voltage of 75 to 1000VAC. 75-1000VAC 45-65Hz Magnetic back cover The Extech Non-Contact Phase Sequence Tester - PRT200 is a robust tool designed for professionals, featuring a wide voltage range of 75 to 1000VAC and a frequency compatibility of 45 to 65Hz. With LED indicators for phase orientation and live status, along with fully insulated alligator clips and a magnetic back cover for easy attachment, this tester is built for efficiency and safety in electrical diagnostics.