Amazon.com: Williams Sound HED 027 Heavy-Duty Folding Mono Headphones, Adult Size, 100mW Max Power Input, 3.5mm Plug, 39" Cord, Compatible with Williams AV Receivers and Pocketalkers, Black : Electronics
Poly Blackwire 3315-M USB-C and 3.5mm Mono Headset
Jabra Evolve 65 SE UC Mono - headset - with charging stand - 6593-833-499 - Wireless Headsets - CDW.com
Jabra Evolve2 30 Wired Mono Headset 23089-899-879 B&H Photo Video
Jabra Evolve2 55 Mono Headset Wireless Bluetooth Headset
V7 3.5mm Deluxe Mono Headset w Mic, Inline Control & 1.8m Cable (HA401)
Jabra EVOLVE 65 UC MONO Bluetooth Headset 6593-829-409
WNC-2100 Wireless Noise-Canceling Bluetooth® Mono Headset - Andrea Communications
Wired Mono Headset | TARGUS
Morpheus 360 Connect USB Mono Headset with Boom Microphone - Noise Can – www.morpheus360.com
Mono Headphones
Amazon.com: Logitech H570e Wired Headset, Mono Headphones with Noise-Cancelling Microphone, USB, in-Line Controls with Mute Button, Indicator LED, PC/Mac/Laptop - Black : Electronics