No extra hardware needed, just your PC, a microphone, speakers and you are ready to call CQ on the virtual Ham Radio bands. Once you have installed this Ham Radio Software you will be able to communicate with thousands of Amateur Radio operators and radio enthusiasts from over 200 countries around the world. Both Voice (Double Sideband) and CW (Morse code) is supported. The software works in Windows, Linux and Mac or any other Java driven system. HamSphere can be used by licensed Amateur Radio operators and unlicensed radio enthusiasts.