With Standard Lotus Socket External Sound Input,it Can Be Connected to Computer,mobile Phone and Other Audio.You Can Full Frequency Or Low Frequency Output,there Is No Human Voice Output in Low Frequency () State.With Short Circuit Protection and Reverse Connection Protection,double Insurance Design,although You Can Use It With and Boldness.The Built-in Squelch Circuit Can Eliminate Some Noise,making the Sound Quality more Beautiful and more Pleasant.colour: as shownMaterial: PC+metalPackage Contents:1 x Car Power Amplifier Board(Due to different batches, the appearance of the product may be different, the function is the same)Only the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.