The Vonage V-Phone is a VOIP phone that fits right on your keychain.  The phone includes Vonage Talk Software pre-loaded, a Detachable Stereo Earpiece Microphone, and 250MB Usable Portable Memory Storage.  Each V-Phone comes with its own Vonage phone number and to use the phone you simply need to plug the phone into a USB port, connect the ear piece and its ready to go.  Vonage Website, Via Uncrate