Wireless Headset - Poly CS540, Connect to desk phones Ideal Headset for office and desk-centric workers across the enterprise looking for a simple-to-set-up, simple-to-use wireless headset for managing desk phone calls. Product Information 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. Wearing Style Monoaural light weight convertible (which can be worn either over-the-ear, over-the-head or behind-the-head option (pictured) sold separately. Work From the Office Easily use at work while on video calls and with the freedom to move about wirelessly. Poly Innovation Poly creates premium audio and video products so you can have your best meeting -- anywhere, anytime, every time. Our headsets, video and audio-conferencing products, desk phones, analytics software and services are beautifully designed and engineered to connect people with incredible clarity. They're pro-grade, easy to use and work seamlessly with all the best video and audio conferencing services. With Poly (Plantronics, Inc. – formerly Plantronics and Polycom), you'll do more than just show up, you'll stand out.