The branding on this model is fictional and you can replace it by your own using the labeled Image Texture nodes in the "PlasticRough" material. If you need to move or scale your logo, you can make use of the Mapping node. 

Your texture for the logo should use an alpha channel. If it is meant to be colored, connect it to the material's color socket.

If you want your logo to not have a bump map or you want to edit its value, mute or alter the nodes inside the "Side Logos Bump" frame.

The "USBChargerInfo" texture is monochrome, does not use an alpha channel, and you can easily replace the logo in it through some quick image editing.

Upon opening the file, check the subdivision levels for both objects and set them according to your needs.