Poly Voyager 4310 UC USB A Monaural headset | UnifiedCommunications.com
Amazon.com: Best Sound Noise Cancel Monaural Phone Headset - 2.5 mm Telephone Headset Compatible with Plantronics QD : Electronics
Plantronics Monaural Supra H251 Telephone Headset
Amazon.com: Monaural Headset with Microphone and Quick Disconnect, RJ9 Plug Only for Cisco IP Phones 794X 796X 797X 69XX Series and 8811,8841,8851,8861,8941,8945,8961,9951,9971 etc : Electronics
NC-181 On-Ear Mono (Monaural) PC Headset - Andrea Communications
Amazon.com : TRIPRO Monaural USB VoIP Headset for Computer Internet Calls, VoIP Communication, Skype, Webinar, Softphone, Call Center with Noise Cancelling Microphone and Volume Adjuster : Office Products
Classic Monaural Corded Headset
Plantronics Blackwire 5210 Over the Head Monaural Headset - Walmart.com
Spracht ZuM ZUM350M Universal Monaural Headset - 3.5/2.5MM
SENNHEISER SC 130 USB WIRED MONAURAL HEADSET (508314) - telecomdepotdirect.com
IPN Entry-level 2.5/ 3.5mm Monaural Headset w/ Noise-canceling Mic (IP – Global Communication
Amazon.com: IPD IPH-160 Professional Monaural Noise Cancelling,Corded Headset with U10 Bottom Cable w RJ9 Jack Works with Cisco IP 6800,7800,8000 and Some 7900 Series Phones : Electronics