More headsets, more wireless freedom. | CS500 XD™ SERIESA new addition to Plantronics legendary CS family for desk phone communications, the CS500 XD Series is a high-quality solution for fitting more wireless headsets in an office environment.SUPERIOR COMFORT AND CALL MANAGEMENT Gain mobility-multitask hands-free up to 350 feet Audio controls for volume/mute at your fingertips Conference in up to three additional CS500 XD headsets for enhanced collaboration CS540-XD/CS545-XD offer an ultra-light convertible headset with choice of three comfort tested wearing options to match your personal style Use with electronic hookswitch cable or handset lifter to remotely answer/end calls OUTSTANDING AUDIO QUALITY 900 MHz wireless technology allows for the highest number of available channels for clear conversations Choose narrowband mode to preserve talk time or wideband mode for clearer conversations Noise-canceling microphone reduces background noise interruptions, ensuring great audio quality and easing listener fatigue Enhanced digital signal processing (DSP) provides more natural sounding voice RECOMMENDED ACCESSORIES HL10™ handset lifter adds remote call answer/ end convenience Electronic hookswitch cable electronically adds remote answer/end convenience, eliminating the need for a handset lifter. Manufacturer: HP Inc. Manufacturer Part Number: 85T24AAABA. Brand Name: Poly. Product Series: CS500 XD. Product Model: CS520-XD. Product Name: CS520-XD Headset. Product Type: Headset. [Technical Information] Connectivity Technology: Wireless. Wireless Operating Distance: 350 ft. Sound Mode: Stereo. Features: SoundGuard Technology. Hearing Protection. Comfortable. Hands-free. Electronic Hook Switch (EHS) Capable. Digital Signal Processing (DSP). [Battery Information] Battery Talk Time: 8.50 Hour. [Earpiece] Earpiece Design: Over-the-head. Earpiece T