Derry owned a computer, so this wasn't exactly difficult. She mentally listed off what every thing did, but figured she wouldn't say what they all were, since that was kind of hogging the limelight. "The speakers play sound from your computer." she said, after raising her hand. "Anything that happens on the computer that plays sound comes out of them. Music, sound effects, video soundtracks. That kind of thing..."

...

Any of the purebloods got something to say? That could be funny.