Next , please. And um like uh we have uh designed uh before we have seen some uh few things like  instead off buttons we have some scrolls. Uh b but a b a push-button requires a simple chip underneath it , but whereas a scroll wheel requires normally a regular chip which is a higher price range. Like for s scrolls we have to go for a sophisticated and and k uh  uh uh full  a complete chip.
Okay.
Okay.
Uh and a as energy source we offer a basic battery , a more ingenious uh hard dynamo , um a kinetic provision of energy , more than what is that you shake casually to provide energy. So that also we can have in a battery , uh or we can use solar sells. Uh.