The subwoofer module houses the integrated 3-channel mixer with XLR and 1/4" inputs on channels 1 and 2. Channel 3 features a stereo 3.5mm Aux input and can be switched to the onboard media player, which offers USB, SD, and Bluetooth playback. The system is capable of True Wireless Stereo (TWS), allowing an additional speaker to be used for left and right deployment. Channels 1 and 2 include an echo send, while a bass control knob allows you to add or subtract 80 Hz, should you be using the system for voice-only applications or for music/DJ playback.