| Brand | Unbranded |
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Check the listing for details. PC218 Phase Polarity Tester Checker Detector Audio Speaker Mic Sound Testing. Condition: New. Listed at 132.66 USD. Input impedance (Mic) : 1KOhm. - Input level (Mic) : 10mV - 1V. - 1 x Tester. - Input impedance (Line) : 10KOhm. - Input level (Line) : 0.5V to 50VOutput level : 0V to 1V. Usually it costs about 30USD-50USD.