| Country of Origin | China |
|---|---|
| Brand | Unbranded |
| Output source impedance | 1KOhm |
| Power | 9V PP3 battery (= approx 50 hours) |
| Power drain | 10mA |
Check the listing for details. PC218 Phase Polarity Tester Checker Detector Speaker Microphone Sound Testing. Condition: New, Made in China. Listed at 192.89 USD. Which is the necessary testing tools of sound engineering installation and commissioning. and can be used for the phase accuracy test of any Sound System. The system consists of two hand-held units, PC218-A pulse can produce their own sound signal and then output the sound signal of 1Hz 1 second through XLR for PC218-B to testing.