uploading duracelltomi themes

please help, i tried uploading duracelltomi theme on wordpress theme and below is the result i get.

Unpacking the package…
Installing the theme…

The package could not be installed. The theme is missing the style.css stylesheet.

Theme install failed.

How can i resolve this so that i can make use of the theme.

thanks for your candid responds

https://wordpress.org/plugins/duracelltomi-google-tag-manager/