
Just use your smartphone. It didn't come with the CD. You can easily download polarity test app on your phone for free. Connect your phone to your stereo via Bluetooth or use an extra cable. The app already contains a pulse used to check polarity, out of phase with the speakers. There are several uses. This device is obsolete.

Autoscanner for car diagnostics Rokodil ScanX Pro, OBD2 scanner
29 Review

Vgate ICar Pro Bluetooth 3.0 OBD2 Code Reader | Scan Tool For Torque Android To Check Engine Light & Car Faults
19 Review

Upgrade Your Car Diagnostics With 16 Pin OBD2 Extension Cable Splitter - Male To Dual Female Y Cable - 50CM
17 Review

MUCAR CDL20 OBD2 Scanner - Check Engine Code Reader And Diagnostic Scan Tool For All OBD II Protocol Cars Since 1996, With O2 Sensor, EVAP System, And Smog Test Functions
23 Review