You are downloading the Battle.net Authenticator XAP file v220.127.116.11 for Windows Phone. Battle.net Authenticator is a free Productivity App: Do you play Blizzard Entertainment games like World of Warcraft or StarCraft II: Wings of Liberty? Protect your Battle.net account with Blizzard's official. You can now download the offline XAP package file to install & try it.
Download Locations for Battle.net Authenticator 18.104.22.168 XAP file
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Battle.net Authenticator XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.