Plantronics Savi 8210 UC Mono USB wireless headset includes USB-A adapter.  Wireless range up to 300ft (line of sight). This is an over-the-head mono style headset.  Excellent choice for busy people that makes to make softphone VoIP phone calls from a computer (PC or Mac). 

Key Features:

• Mono over-the-head style
• USB-A dongle included
• UC certified for VoIP from Avaya, Cisco, IBM, Skype® and more
• Roam up to 300 feet from your PC (line of sight)
• DECT 6.0 technology provides best-in-class audio; eliminates interference from Wi-Fi
• With one-touch call answer/end, vol+/-, mute and flash, switch between softphone calls for simple call management
• Up to 7 hours of battery time, 30+ hours standby
• Noise-canceling microphone
• Telecoil Hearing Aid Compatible (HAC) 
• An energy-efficient approach to power usage, with an adaptive power system, delivers longer talk and standby times

Old Poly part # 209213-01

New HP part # 77T29AA#ABA

For more information, see Plantronics Savi 8210 UC datasheet