The whole thing also works on a laptop etc.
The sound is reasonable, but not a HiFi.
Volume control (right LS) so you may switch only once. The standby mode is LT. YAMAHA only up to max. Be 0.5 watts / hour, which would be about 1.20 Euro per year in electricity costs, so it is probably not worth the boxes off completely (which is also a button on the front panel is possible, however).
By design, I would have rather wished that the perforated sheets are the same up and down - but for the color selection is unbeatable well.