Yeah.
I'll come to that later.
Okay.
And we of course have the traditional uh solar power , which is just uh uh uh uh uh a piece of material on the remote control which transfers light energy into electricity.  The user interface controls , um of course we have the push-buttons and uh we also have scroll-wheels. And these scroll-wheels can also be integrated with buttons. So it's just like a mouse. You can scroll 'em , you can also push it. Um  uh in the indicators we have the L_C_D_ displays , which means uh you can watch uh in a display w which channel you have chosen or something like that of the li amount of volume which is uh currently