Attributes -  Cost-effective -  Low international and long distance calling rates -  Simple and quick installation -  User-friendly interface -  Easy-to-carry, take it anywhere -  Easy-to-use, like a regular phone -  Supports private and dynamic IP -  Compatible with Windows operation systems -  Good voice quality and stability -  Independent from your sound card (does not slow down your computer) -  Useable with a desktop or a notebook -  Portable with your notebook