This is the Plantronics WO350 + HL10 Savi Office Binaural wireless headset system Combo Package.  Savi Office is the wireless headset system that unifies voice communications and integrates your desk phone and PC audio providing business critical sound quality. Use Savi Office to mix calls between your PC (USB port) and desk phone for real-time collaboration, or easily switch from one type of audio or device to another. .  Retail Price $459.95

New! - Also see the new Plantronics W720+HL10 Combo Wireless Package 

Key Features:

• Plantronics HL10 lifter included in this package.
• Range up to 350ft.  DECT 6.0, 1.9Ghz Frequency.
• 9 hours of Battery Enabled Talk/ Listen Time
• Binaural - Both ears are covered both ultimate sound quality
• Wideband for best PC audio telephony
• Noise-canceling microphone filters out background noise
• Digital Signal Processing (DSP) provides more natural voice sound
• SoundGuard® Technology provides protection against audio spikes
• Integrates PC and desk phone audio
• Business critical sound quality
• Premium PC audio
• Multiple wearing styles; convertible, over-the-ear and over-the-head
• Plug-and-play
• Energy-efficient adaptive power system~

For more detail information see Plantronics WO350 Savi Office datasheet