Amazon.com: C G CHANGEEK Single Earbud, One Ear Sport Earphone with Hook, Mono Headphone with Mic and in-line Control for Safe Driving, Biking, Running, Gaming and Working, for Right Ear Wearing Only,
Manhattan Mono USB Headset - Single-sided Over-ear Design - In-line Volume Control - Adjustable Microphone - Black - Walmart.com
Amazon.com: Avantree Aria Line - Wired Over Ear Headphones with Extra-Long Cord for PC & TV Watching with Individual Volume Control & Stereo/Dual Mono Mode : Electronics
Manhattan Mono USB Headset (179867)
Plantronics EncorePro 530 Mono Over the Ear Noise-Cancelling Headset
Kensington USB Mono Headset with Mic and Volume Control - Mono - USB Type A - Wired - Over-the-head - Monaural - Ear-cup - 6 ft Cable - Omni-directional, Noise Cancelling Microphone - Black K80100WW 085896801009
Jabra Evolve 20 MS Mono Headset (4993-823-109)
Amazon.com: Jabra Evolve2 65 UC Wireless Headset with Link380c, Mono, Black – Wireless Bluetooth Headset for Calls and Music, 37 Hours of Battery Life, Passive Noise Cancelling Headphones : Electronics
Poly Voyager 4300 UC 4310-M Headset - Mono - USB Type C - Wired/Wireless - Bluetooth - 164 ft - 20 Hz - 20 kHz - Over-the-head - Monaural - Ear-cup - 4.92 ft Cable - Noise Cancelling Mi