The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Kimio Tanaka:
Transfer contacts information via bluetooth.Business card exchange function - Exchange for another iPhone/iPod touch/iPad the data registered into the contact of iPhone/iPod touch/iPad via Bluetooth. - Transmit the account information of social networks, such as twitter registered into the contact, mixi, and Skype. facebook support- Acquire the picture of the friend of facebook, and a name and register with the contact of iPhone/iPod touch/iPad. - Acquire the event information on facebook and register with the calendar of iPhone/iPod touch/iPad.