This is my second RTX DUALphone. I have had my first for about two years. It is fantastic and still the only option on the market. I make a lot of international calls so this unit saves me a fortune. Calls are clear and easy to make. Dial a number or call up a stored number, press call and the phone asks if you would like to call with Skype or your landline. The box connects directly to your router so no need to have a computer running. This second unit is for a friend who liked mine.