Uh the first one is case to keep all the components like integrated circuit , battery , etcetera , etcetera , it's like  Uh it can be a plastic one , hard plastic , so that it can be strong , even if you just uh uh ,  you know , if you   if it falls down , then it doesn't  break. So it should be strong.
Mm-hmm.
And uh uh there are no harmful materials used in that. And it should be recyclable.
Mm-hmm.