A universal phone volume amplifier that adapts to almost all single and multi-line telephones (not compatible with dial-in handset cor cordless phones). Works with a variety of headset styles (headset not included). Adjustable outgong and incoming colume control. Call Calrity® technology offers superior sound quality. Includes lightweight 10' coil cord and adaptor jack so amplifier may be used with headsets (not included) having 2.5 mm jacks. One year manufacturer's warranty. |