Computer sound bar provides impressive treble and deep bass.Its unique cavity design perfectly maximizes the loudness of every audio unit.The best materials for this computer speakers are durable and non-toxic,which allows people to use them without worries.There are two methods for user to connect:Bluetooth and AUX wired connection. Plug the USB connector of PC Speakers (no built-in battery) directly into the USB port can achieve automatic power on. The volume can be easily adjusted through the knob. Setting up the speakers couldn't be easier.