4 Dynamic Lighting Modes: Soulion newly upgraded R50 has 4 dynamic LED lighting modes: gradient mode, breathing mode, rhythm mode and monochrome fixed mode, which you can customize according to your preferences. The light button can turn on/off the light USB Mode: Plug into the USB port for power, press the "M" key to select "Aux Mode", the 3.5mm jack for sound. The soundbar is widely compatible with various devices such as PCs, laptops, tablets, smartphones and more