Plantronics, Inc. introduced the first lightweight communications headset in 1962 & is today the world's leading designer, manufacturer & marketer of lightweight communications headset products. In addition, the Company offers products for the computer & mobile market segments, specialty telephone products, such as amplified telephone headsets, telephones for hearing-impaired users & noise-canceling headsets & handsets for use in high-noise environments. Plantronics Bi-Way Switch allows the mechanical change between switches with integrated headset st&, which enables you to change between the use of the hand listener & the headsets.