AGPtek Hands-free Noise Volume Control Cancelling Corded Monaural Headset Headphone with Mic Mircrophone for Call Center Phone Desk Telephone - Cord with USB Plug Noise proof microphone and 150 ohms speakeroffer high quality, clear communication. Accurate 25 levels digital volume control of the headset speaker. You can more easy to control the voice volume. Attracting appearance, durable ear cushion and comfortable, lightweight design Adjustable, to easily adjust to suit for your mouth and head. Make you more comfortable. Great Compatibility and application, suits for most basic and business telephones, such as Phone sales, Telephone Counseling Services, Insurance, Hospitals, Banks, Telecom operators, Enterprises Easy to use, plug directly into your headset-ready telephone, you dont need to go through complicated process.