It is a solar panel model yes you cant in you pocket but can carry in your car or bag
As you know the task is to convert solar energy into electricity and to operate and charge the devices it is connected to.
By connecting any USB output device you are using to the usb output of the solar panel, you can provide your devices with solar power and charge.
Of course, including your cell phone ...
But let's not forget that the portable solar panel does not store energy. Only the devices you connect with usb are powered by solar energy.
The solar panel has 2.5 volt usb output.