Amazon.com: Jabra Evolve 65 UC Wireless Headset, Mono – Includes Link 370 USB Adapter – Bluetooth Headset with Industry-Leading Wireless Performance, Passive Noise Cancellation, All Day Battery : Electronics
The world's best professional digital corded headset | Jabra Engage 50 Stereo & Mono
Mono Bluetooth Headset | Sinji
Logitech H820e Single Ear Wireless Headset - Newegg.com