Dual Connection & Compatibility With dual connectivity, It enables the computer headset with microphone to pair with 2 devices simultaneously. The best choice for your office. AI Noise Cancellation Mic This wireless headset with microphone utilizes advanced ENC technology to effectively cancel up to 99.6% of ambient noise, ensuring your voice is heard clearly and your communication is always as smooth as silk. You can mute it anytime during a call to protect your privacy (the mute function only activates during calls or meetings). USB Dongle Plug and Play This bluetooth headset with microphone offers two connection options: Bluetooth V5.0 and USB dongle, allowing you to choose according to your actual needs. Wireless ranges up to 49feet/15m, that offers less transmission delay during the call. 40mm audio drivers of computer headset provides HD sound and world class speakers, please enjoy your music time and clear conversation. Convenient Charging & Storage The Bluetooth headphones with mic includes a Type-c charging cable and a charging base. offers up to 26 hours clear talking time and 210 hours standby time after fully charged 2 hours. When you're done using the bluetooth headphones, simply place it on the base to recharge. They do work and are in good used condition. There is a small scratch on the headband. Comes from a cat friendly, smoke free home. Make me an offer! I am highly motivated to sell!! Bundle with other items and save!!