Poly Plantronics H31Cd Starset

All-day Comfort. The super-lightweight StarSet, with soft, pliable ear tips and ergonomic behind-the-ear styling, stays comfortable all day, Superior Sound. StarSet microphone and speaker provide clear and natural voice tones, Voice Tube - Plantronics trademark design: light weight and unobtrusive, delivers great sound quality in all but the noisiest environments, Greater flexibility. Various Plantronics adapters allow StarSet headsets to work with any phone system