This sale is for (1) Plantronics CS540 Convertible Wireless Head Set. This head set is New condition and comes in the Original Packaging.. Box has been opened for Pictures.. Quick tech specs Wireless headset for use with office phone offers superior comfort and mobility up to 350 ft. Voice-dedicated, 1.9 GHz DECT technology provides superior audio quality; up to 6-hour talk time 3 wearing styles for ultimate comfort; wideband audio support and noise-canceling microphone Digital encryption assures secure conversations Battery is 80% recharged in 1.5 hours and fully recharged in 3 hours View All Know your gear This Wireless Headset System connects to your office phone, giving you superior comfort and mobility up to 350 feet. Voice-dedicated 1.9 GHz DECT technology and advanced wideband audio provide uncompromised audio quality, the lowest probability of interference, and up to 9 hours of talk time. Adaptive power system optimizes balance between range and talk time. Volume and mute controls at your fingertips allow adjustments remotely. Digital encryption assures secure conversations. You can conference up to three additional CS headsets to have co-workers easily join calls. Battery is 80 percent recharged in 1.5 hours and fully recharged in 3 hours. Convertible headset gives you your choice of over the head, over the ear, or behind the neck wearing style.