Plantronics CS50 USB Wireless Microphone (900 MHz)

USB connection; over the ear fit
For computer and VOIP, not compatible with traditional telephone systems
Digital encryption; Up to 200 foot range
Good Speech accuracy and performance
Instant USB connectivity for easy compatibility and quick set-up.
200 foot range with no headset cables
The first wireless with remote ring detection and call answer/end at the touch of a button, thanks to Plantronics’ PerSonoCall™ software
Superior sound quality for clear, private, and completely secure calls, including noise-canceling microphone.