BT Wireless Headset for Office with Base | Naztech – Naztech.com
Vont Bluetooth Headset with Microphone - Vont Innovations
Poly Voyager 5200 Bluetooth Headset (Plantronics) - Single-Ear (Mono) Bluetooth Earpiece with Noise Canceling Mic - Cell/Mobile Phone Headset - Walmart.com
Amazon.com: MAIRDI Telephone Headset with RJ9 Jack & 3.5mm Connector for Landline Deskphone Cell Phone PC Laptop, Office Headset with Microphone for Call Center, Work for Cisco Phone 7941 7965 6941 7861 8811 : Electronics
Leitner Premium Wired Headset: The Best Corded Office Headset
Cell-phone TRRS Headset - Earbud Headphones w/ Microphone : ID 1966 : $3.95 : Adafruit Industries, Unique & fun DIY electronics and kits