The Advent ASP20BK20 2.0 PC Speakers are a quick and easy way to upgrade of the audio of your laptop or PC. These stereo speakers feature great sound quality wrapped in a well-designed black exterior. Simply plug these speakers in the mains socket, connect the audio cable to the 3.5 mm jack of your PC or laptop and you're good to go. You can also use them to play music from your phone or any other device with the 3.5 mm slot. The speakers have very straightforward controls - there's a single knob to switch them on and adjust the volume. Under the knob, there's another 3.5 mm audio slot. Plug your headphones there when you need to keep the noise down, the speakers will automatically turn to mute but you will still hear your audio.