The HS-115 is a modern 8-way handset (speakerphone, microphone and controls) used with the StoneCold communications system. It allows users to take an incoming call while they are talking to someone else on another handset, and to switch between them without disconnecting either of the calls. The HS-115 also offers advanced features such as conference calling, customer feedback, music-on-hold, automated voice response, and voice mail. Additionally, users can program their own special features and memory functions to customize the system for their needs.