Plantronics - CS540 Wireless DECT HeadsetConnects 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