The Extech PRT200 Non-Contact Phase Sequence Tester comes with an Adjustable Hi/Lo LED brightness switch for making measurements in dimly lit areas or sunlight, Durable housing with back cover magnet for attachment to an AC distribution panel for easy measurement. 75 to 1000VAC input voltage with 45 to 65Hz frequency range. It also comes complete with three built-in 30" test leads with large color-coded alligator clips, four AA batteries, and pouch case.
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