The Sennheiser SH230 is a lightweight, over-the-head, single-sided telephone headset that is packed with features at an affordable price. Its flexible omni-directional...
The Sennheiser SH250 is an over-the-head, double-sided telephone headset with flexible boom, omni-directional microphone and ActiveGard(TM) protection technology.
* Note: Wireless headsets do not have the same functionality as desk phones. for an article on what you can and can't do with a wireless phone headset.