The USB Phone is a voice communications terminal over the internet. It is a different way of communications from traditional telephones. It connects directly to PC through the USB port. With DSP chipset set inside. Its sound is very clear. PC-to-PC is free of charge. You can make calls from PC to regular phone when the internet is connected with PSTN network by gateway. It can work with cable and Dial-up internet, Broadband and LAN connections. It is especially suitable for those who make long-distance calls frequently. Easy to use, easy to set up. The best of all, it saves money.