With CalypsoKey – NFC for the iPhone, you can leave your keys behind and unlock doors just with a tap on your CalypsoCase.
Featuring the new near field communication (NFC) possibilities for your iPhone with the CalypsoKey.
“No apps and no charging are needed.
The built-in dual-band RFID antenna brings your entire portfolio of identification cards into one CalypsoCase.
CalypsoKey is available for CalypsoRing and CalypsoLoop designs.”