Plantronics - CS540 Wireless DECT Headset (Poly) - Single Ear (Mono) Convertible (3 wearing styles) - Connects to Desk Phone - Noise Canceling Microphone Description Communicate clearly up to 350 feet away from your desk with the CS540 Wireless Headset from Plantronics. Designed to connect to your desk phone, the CS540 sports a sleek, lightweight design and has been comfort-tested. One-touch controls on the headset allow you to answer or end calls and adjust or mute the volume. The system also enables you to conference in up to three additional headsets for easier collaboration. The headset comes with ear loops as well as a headband, allowing you to find the most comfortable wearing style --over the ear or over the head. Features: Connects To: Desk phones via included cable.Compatible phone models:iPhone Ideal For: Office and desk-centric workers using desk phones Audio Performance: Keep background noise out of your call with a noise-canceling microphone Convertible Wearing Style: Customize your look and feel for all-day comfortlightweight, convertible design comes with 3 wearing options (over-the-ear, over-the-head or behind-the-head* *Behind-the-head neckband sold separately) Talk Time and 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 Product Details: Brand: Poly Model Name: Poly CS540 - Convertible Wireless Headset Color: Black Form Factor: Over-the-ear, Over-the-head, One-Ear Connectivity Technology: Wireless Product Dimensions: 6.5 x 1.25 x 6.48 inches Item Weight: 1.15 pounds Item model number: 84693-01 National Stock Number: 5965-01-626-3151 Batteries: 1 Lithium Polymer batteries required. Is Discontinued By Manufacturer: No Wireless communication technologies: Bluetooth Connectivity technologies: Wireless Special features: Hands Free, Convertible, Noise Cancelling Other display features: Wireless Form Factor: On Ear Color: Black Whats in the box: Wireless Headset,User Manual,Adapter,Charging Base Department: Electronics Manufacturer: Plantronics Language: English Date First Available: January 20, 2011 Weight: 1.15 Pounds Units: 1.0 Count Number Of Items: 1