带4.0高速蓝牙,USB，SD卡，线路4种输入，带遥控器，带1路信号放大输出（用于连接副箱）额定功率：20W-40W                                                                                                                 频率响应：90-18000灵敏度：93dB±3dB                                                                     输入电压：220V   喇叭单元：4.5〞 + 2.5〞