Plantronics T10H Single-Line Headset Telephone amplifier. This is a stand-alone telephone with standard features such as redial flash and mute. The T10H Headset Telephone features a headset rather than a traditional telephone handset making it ideal for telephone-intensive SOHO applications. The T10H Headset Telephone connects to a standard telephone jack. Complete single-line telephone. Connects to existing telephone jacks. Cables included with Quick Disconnect for H-series Headsets. Plantronics H-Series Headset not included. Adjustable volume control and tone control. Fully functional dialpad. Redial flash and mute buttons. Mute indicator light. Ringer sound adjustment. Online indicator and headset stand included. Single-line telephone amplifier. Quick Disconnect feature for added freedom. Dialing Modes: Pulse tone. Single-line telephone. On-line indicator and headset stand included. Volume and tone control. Mute with indicator light. Flash and redial. On/off switch for ringer. Cables included with Quick Disconnect.