Description:<br />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<br /><br />  How to Use:  <br />First paragraph: Left channel noise signal (if the player first paragraph when the right horn has noise signals? left and right channel anti) <br />Second paragraph: Right channel noise signal (if playing the first paragraph when the noise signal in the left speaker? also shows that the left and right sound Road anti)<br />Third and fourth: The same are the phase detection signal? the recording of the same content for fear of the disc is scratched? which one can not play smoothly? you can choose another section to test! <br /><br />  Testing Method: <br />Horn player after a fixed frequency signal generated at this time in front of the phase detector you want to test a probe aligned speakers. Hold the test button (TEST): <br />If the green light is flashing 3 red light 1 times? the speaker output phase (which is correct.)<br />If the green light is flashing once the red light flash three times? said the speaker output for the negative phase (that is? your speaker wire reversed.) that can swap positive and negative terminal of the speaker to address.<br /><br />    Specifications<br />Specification<br />	 Power Supply: 6F22 9V                                                  <br />                        Color  : Silver? Black                                                	<br />Dimension and Weight<br />	 Product weight   : 0.118 kg                                                  <br />                        Package weight   : 0.240 kg                                                  <br />                        Product size (L x W x H)  : 10.5 x 6.8 x 2.5 cm / 2.7 x 1.6 x 1.1 inches                                                  <br />                        Package size (L x W x H)  : 18.0 x 15.0 x 4.0 cm                                                	<br />Package contents<br />	 Package contents: 1 x Phase Meter (Battery included)? 1 x CD                                                	<br /><br /><br /><br />                                                <br />