BUILT-IN DSP SOUND OPTIMIZATION CHIPlaptop speakers come with a built-in DSP chip which deliver rich sound and clean bass performance. which optimizes the sound performance, and support 3 EQ modes for optimized sound output. SINGLE USB CABLE FOR AUDIO & POWERNo need for 3.5mm AUX jack, the single USB cable can feed both audio and electrical power for the USB computer speaker. Greatly help you avoid messy cable.