Black Speaker Polarity Tester PH Phase Meter Phasemeter for Auto Car
Product Name: PH Phase Meter; Material: Plastic,Metal
Package Content: 1 x PH Phase Meter
Powered By: 1 x 9V 6F22 Battery(not included)
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.