※ all the way line input, unbalanced signal; ※ single-core shield with a standard audio signal for the signal transmission line; ※ flexible connection port, easy to use; ※ DC12V / AC220V power supply; ※ reasonable structure, nice, ceiling installation; ※ built-in high-fidelity hi-fi level high, low-frequency speakers; ※ high efficiency, low distortion, low loss;
