Using this Movek myMix Personal Monitor Mixer is easy. First, connect it to a PoE - enabled source to power it up as it doesn't have a built - in power supply. You can then use the main knob (even without the cover) to adjust settings. When using it, be careful as the screen has scratches, so avoid applying too much pressure on it. For maintenance, keep it in a clean and dry place. Regularly check the connections to ensure stable performance. And don't worry about the missing knob cover; it won't affect the functionality.