Voyager 5200 Office & UC Series - Mono Bluetooth Headset | Poly, formerly Plantronics & Polycom
Insignia™ On-Ear Analog Mono Headset Black NS-PAH5101 - Best Buy
Jabra Evolve 30 II MS Mono Headset (5393-823-309)
Wired Mono Headset | TARGUS
AC-840 USB Mono Headset | Headphone with a microphone — Cyber Acoustics
Sennheiser 231 Mono Bluetooth Headset- The ultra-secure bluetooth wireless headset is the perfect choice for financial, medical, government and contact centers or anywhere sensitive conversations happen
MIC-500 Professional Headset Microphone for Wireless Systems with 3.5 Mono Connector. Beige. - Translation Equipment
Amazon.com: Jabra Engage 65 Wireless Headset, Mono – Telephone Headset with Industry-Leading Wireless Performance, Advanced Noise-Cancelling Microphone, Call Center Headset with All Day Battery Life : Electronics