Plantronics headsets have become the world's talking point, with more than six million in use today. The Supra headset owes its popularity to the fact that it combines light weight with superior sound quality and outstanding comfort. A fully adjustable headband design provides good stability, while a soft ear cushion not only gives optimum comfort but also helps buffer distracting background noise. If it becomes necessary for wearers to leave their desks, simply use the Quick Disconnect feature without removing the headset, and the other party stays on the line. Plantronics uses a superior voice tube technology and design, with patented SoundGuard Plus and Call Clarity technology, which contribute to the Supra headset's excellent sound quality. For the best results use the following amplifiers: Vista M12, A20 Telephone Amplifier, CA10 Cordless Telephone Amplifier.