Plantronics DA40 Computer USB Headset Adapter *Discontinued*

Key Features:

• Ideal for enterprise offices meeting aggressive price points, or users with both a desk phone and softphone
• Affordably joins enterprise-class headsets with VoIP softphones
• High-quality alternative to consumer-grade headset systems.
• Compact size takes up minimal desk space

For more details see Plantronics DA40 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.