This an UNLOCK KEY (FULL License) for Network Connections for Android.
You must have the Network Connections app installed before purchasing (search for "Network Connections" in the Amazon App Store).
IMPORTANT! THE LICENSE KEY DOESN'T HAVE A LAUNCHER ICON ON YOUR HOME SCREEN AND CANNOT BE LAUNCHED. IT ONLY NEEDS TO BE INSTALLED.
Click on INSTALL and the UNLOCK KEY will be automatically installed on your device. You can find it as separate package in the "Settings" / "Manage Applications" list on your device.
If you want to check whether the UNLOCK KEY is successfully installed, open the Network Connections app (you should close it first if already opened), scroll to Settings tab, and click on Legal Terms button at the bottom. There you will see a "LICENSE - Amazon App Store" message.