| Country of Origin | China |
|---|---|
| Brand | Unbranded |
| Power | 9V PP3 battery (= approx 50 hours) |
Check the listing for details. PC218 Phase Polarity Tester Checker Audio Speaker Micro Sound Phase Detector. Condition: New, Made in China. Listed at 164.46 USD. PC218 Aluminum Alloy Shell Phase Polarity Tester Checker Audio Speaker Microphone Sound Phase Testing Detector. - Input impedance (Mic) : 1KOhm. - Input level (Mic) : 10mV - 1V. - 1 x Tester. - Input impedance (Line) : 10KOhm.