Plantronics CS50 900MHz Wireless Telephone Over the Head or Ear Headset System CS50 900MHz Wireless Telephone Headset System • Up to 300-ft. range from base unit • Convertible headset fits over the head or ear Excellent sound quality with noise canceling microphone. Answer and end calls with a touch of a button when you're away from your desk. Shown with required Handset Lifter (PLNHL10), sold separately. Talk up to eight hours without recharging.