Car Audio System of Speaker Polarity Tester FH-168 Phase Meter Phasemeter;

Feature:
Perfect for safely troubleshooting and testing audio systems.
This phase meter can test all speakers of all car, such as small treble, door speakers, subwoofer, etc.
Play section 1 or 2, can check the left/right channel connection is right or not.
Play section 3 or 4, the sound speaker will produce a fixed frequency signal.
Then press the 'test' button on the phasemeter, 3 green light flash and 1 red light indicates that the speaker output is in positive phase (correct connection) ; 3 red light flash and 1 green light indicates that the speaker output is in negative phase (reversed connection).

Specification:
Material: Plastic
Color: Black
Size: 108 x 70 x 25mm./ approx.(4.25 x 2.71 x 0.98 inch)

Package Include:
1 x FH Phase Meter.
Please contact customer service to request a driver.