The device page, found under the Device List tab under Fleet Tracking contains device information such as Network, Display, Software, Hardware information, as well as battery levels, RAM levels, and geolocation.
Be sure to have enabled all of the Report Settings of the associated Profile into which the device is enrolled.
These Report Settings can be found at the bottom of the Policies list of your Profile.
Also verify that the device geolocation is enable in the Configuration tab.