5 inch Car Tunnel shape subwoofer Bluetooth wireless speaker karaok 5 inch multimedia speaker system karaok digital audio You can connect the microphone and sing karaok You can play the memory card, USB,FM radio Connect the car High-fidelity sound,Stereo speakers,built-in resonance radiator device, equipped with high-efficiency power amplifier,super-low- frequency dynamic bass-rich, flexible,achieve a more shocking extremely super bass effect