 Webcams are popular, relatively low cost devices which can provide live video and audio streams via personal computers, and can be used with many software clients for both video calls and videoconferencing.A videoconference system is generally higher cost than a videophone and deploys greater capabilities.A "videoconference" (also known as a "videoteleconference") allows two or more locations to communicate via live, simultaneous two-way video and audio transmissions.