Excellent tool for audio system testing. Ideal for troubleshooting or testing car audio systems. This phase meter can be used to test various car speakers, including subwoofers, door speakers, and tweeters. Features - Color: Black - Material: ABS, electronic components - Size: Approximately 11.00 × 7.00 × 2.50 cm / 4.32 × 2.75 × 0.98 in - Designed for safe testing and troubleshooting of audio systems; convenient for everyday use - Compatible with a wide range of car speakers, including door speakers, subwoofers, and tweeters - Features a low battery indicator to alert when battery power is low; helps verify speaker polarity - Sleek, functional design; suitable as a replacement for worn or damaged units - Built to reliable standards; user-friendly, economical, and practical How to Use - Play track 1 or 2 to verify left/right channel connections - Play track 3 or 4 to generate a fixed-frequency signal from the speaker Package Includes - 1 × Speaker Test Phase Meter - 1 × CD Note: Due to variations in lighting and screen settings, the actual product color may differ slightly from images. Slight dimensional variations may occur due to manual measurement.