Over-the-head, professional-grade, single-ear USB headset compatible with Microsoft Office Communicator, Microsoft Lync, and Skype for Business. Also supports Bluetooth, allowing use as a wireless headset. The Blackwire C710-M USB headset is a classic over-the-head type designed for comfortable wear, featuring a noise-canceling microphone to reduce surrounding noise. It supports wideband VoIP for a wider frequency range, enabling voice calls with more natural sound quality. It also features unique functions such as Plantronics' Smart Sensor technology and Dynamic EQ (equalization). - Compatible with both USB and Bluetooth Can be used not only as a wired USB headset but also as a wireless headset thanks to Bluetooth support. The USB connection cable is detachable. - Smart Sensor Technology Detects the headset's wearing state and automatically turns Bluetooth link on/off, answers incoming calls (compatible models only), and plays/pauses audio (AVRCP compatible models only). - Dynamic EQ (Equalization) Function A function that automatically adjusts to the optimal sound quality according to the sound source. - Model: Blackwire C710-M - Accessories: Quick Start Guide, various manuals - Case: Includes a storage case - Brand: Plantronics