The above picture shows what I made.
In order to finish making this device, we need a aluminum shell, a centrifugal fan, a step-up power module and a self-locking button. And I find a great website to help me make this device. You can check this website here.
After I got all the parts I listed before, I start to assembling the my device.
First of all, I need to put the self-locking button into the shell which has already been drilled by UFactory. Unfortunately I made a mistake in the size of button so I need to use the drill driver to make the hole bigger first.