Plantronics - CS540 Wireless DECT Headset (Poly) - Single Ear (Mono) Convertible (3 Wearing Styles) - Connects to Desk Phone - Noise Canceling Microphone

Connects To: Desk phones via included cable., Ideal For: Office and desk-centric workers using desk phones, Audio Performance: Keep background noise out of your call with a noise-canceling microphone., Talk Time & Roaming Range: Work Better, Hands Free, with a roaming range of up to 120 m/400 ft. Talk all day with up to 7 hours of talk time per charge., Global Warranty & Wearing Style: 2 years; monoaural light weight convertible (which can be worn either over-the-ear, over-the-head or behind-the-head).