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Check the listing for details. Automatic Range Conversion 1Hz-50MHz Crystal Frequency Counter Tester LED PCB B. Condition: New. Listed at 17.67 USD. Material: PCB. For Polaris RZR Ranger XP 1000 Pulse Power Plug Bus Bar Harness Connector. Automatic range conversion, without human switching;. 1 Frequency Counter. You can select the power saving mode, if the frequency is not obvious changes within 15 seconds automatically turn off the display;.