The strong audio performance, comfort, and durability of the Entera USB headset makes it ideal for enterprises transitioning to Unified Communications. This corded headset designed for enterprises planning Microsoft® Office Communicator 2007 deployments across a large number of employees. This device supports wideband telephony for high-fidelity sound and comes with a flexible boom and noise-canceling [...]

Whether worn over-the-ear or over-the-head, the convertible style DuoSet allow you to make good use of your hands to multi-task. The headset is comfortably secure, and the sound quality is superb.
Product Features:

Convertible
Noise-canceling microphone
Soft ear cushion for all day comfort
Quick Disconnect™ feature allows you to walk away from the phone while still wearing your headset

With four sizes of user-selectable earbuds and an adjustable receiver arm, the TriStar headset can be custom fitted to just about anyone. Weighing under one-half ounce, this headset is a pleasure to wear. Quick Disconnect™ lets you walk away from your phone while wearing your headset, noise-canceling microphone improves clarity of speech.
Product F eatures:

Earbud [...]