Plantronics DA45 Computer USB Headset Adapter *Discontinued*

Key Features:

• Works with all Plantronics H-series headsets to provide quality audio, reliability, and choice of wearing styles
• Supports wideband audio for clear, natural speech resulting in fewer repeats and lower listener fatigue
• Better audio performance means smoother communications—and greater customer satisfaction
• Echo suppression ensures natural conversation even with VoIP latency
• Ergonomically designed inline controls provide volume, mute (with LED indicator), and easy call answer/end
• PerSonoCall software enables easy call answer/end feature on most softphones, so users can answer and end calls conveniently
• The Quick Disconnect capability makes it easy to disconnect the headset without losing the call  
• old part# 77559-01, 77559-31

For more details see Plantronics DA45 datasheet

So what's the difference between the various Plantronics adapters?:  DA40, DA45, DA55 & DA60:
Plantronics DA40 is an affordable option that does NOT include the PerSono Software & does NOT have the inline volume & mute controls, but does support "Wideband" audio. Only works with the Plantronics H Series Headsets.
Plantronics DA45 is similar to the DA40, but has inline Volume/ Mute controls, Call Answer/End, supports "Wideband" audio & "Echo" management, & comes with the PerSono Call Software program. Only works with the Plantronics H Series Headsets.
Plantronics DA55 Does NOT include the PerSono Software & does NOT have the inline volume & mute controls, but supports DSP (Digital Signal processing) & Echo-Cancellation. Works with both the Plantronics H Series & Polaris Series Headsets.
Plantronics DA60 is similar to the DA55 but does have the inline Volume & Mute controls, comes with the PerSono PRO Software program & supports DSP (Digital Signal processing) & Echo-Cancellation. Works with both the Plantronics H Series & Polaris Series Headsets.