Description: Keep your hands off the phone using this headset. You can increase productivity by working on your computer, taking notes, and handling other tasks - hands-free - while talking to your customers. Enjoy the benefits of completing calls faster and with less likelihood of errors. This headset model offers a substantial increase in comfort and productivity over a handset. The most cost-effective headset solution. COMFORTABLE TO WEAR: Our headsets are made of the flexible metal hose with the positioning accuracy MIC + Structural Design + Durable. THE BEST CALL QUALITY: Around 10,000 times Testing, the microphone boom rotates, 330 degree adjustable boom. Therefore it provides high quality sound. How wonderful it will be! EASY INSTALLATION: Just plug directly into your headset-ready telephone! You just simply plug this modular plug into the headset jack on your phone and it's ready to be used. Specification: 150ohms speaker, to ensure the perfect voice quality Microphone type: electret condenser microphone(ECM) Microphone sensitivity: 40db±3db Microphone voltage: 2.0v Receiver impedance: 150±10 ohm Package Included: 1* Cord with USB Plug Binaural Headset