You'll find dual woofers and tweeters for the back and front, with passive radiators along all sides. In addition, it offers Stack Mode, which enables you to pair with any other Middleton, Emberton II or Willen speakers nearby to extend your listening expertise. If you purchase through links on https://www.bluetoothspeaker.top/original-sound-inalambrico-bluetooth-speaker-wireless-loudspeaker/