Using these Behringer MEDIA 40USB speakers is easy. First, connect them to your power source using the UK plug. If you're using a digital audio source like a computer, use the USB input. For other sources, you can use the stereo analog inputs with the TRS or RCA connectors. You can even mix digital and analog sources. Adjust the volume using the illuminated volume control. If you want to use headphones, just plug them into the front panel 1/8' connector, and the speakers will automatically mute. When it comes to maintenance, keep the speakers clean by using a soft, dry cloth. Don't place them in a very humid or hot environment. And avoid exposing them to dust. If you're not using them for a long time, unplug them from the power source. That's all you need to know to enjoy great sound from these speakers.