12 \"15\" imported coaxial high-bass horn, thickened with advanced medium fiber panel box, 8 layers of process paint, all luxury. Metal wireless to the frequency microphone, sound pickup good effect, suitable for the conference singing promotion. Professional level 9 sound adjustment, built-in bluetooth, voice prompt, microphone priority, loop play, 30A battery fuse, level 3 battery display, level 3 power switch, 3 kinds of interface, metal adjustment knob, can be used in series. Universal pulley.