Plantronics SupraPlus HW251N Black Headband Headsets.

Features:

Noise-Canceling microphone filters out background sound.

Uses Plantronics QD Quick Disconnect Connector.

Must be used with Plantronics Amp or with proper phone or USB adapter cable.

Connectivity Technology: Wired, Earpiece Design: Over-the-head

Earpiece Type: Monaural, Host Interface: Proprietary.

Microphone Design: Boom.

Microphone Technology: Noise Canceling technology.

Lightweight.

Leaves One Ear Uncovered For Person-to-Person Conversations.

Use with plantronics vista M22, M12, or MX10 (we sell them separately) & VOiP Voice Over IP