AI Noise Cancellation & Mute Function: Enjoy great quality calls or meeting with our advanced ENC technology, blocking out most background noise. No more distractions from loud pets or kids. Just hit mute button during calls or meetings for private conversations or to reduce unwanted noise.【NOTE】Mute function exclusively active during calls or meetings | Stable Connectivity: Our Bluetooth headset ensures strong connections with minimal delays because of the advanced Bluetooth chip. It's great for enjoying music and video calls without any lag. Plus, it comes with a Bluetooth dongle for computers that don't have Bluetooth built-in. Works well with popular platforms like Webex, Zoom, MS Teams.etc.【NOTE】The USB dongle is only compatible with Windows system, so the KH53 headset can't be used for desk phones or landlines. Remove the dongle when the headset is not in use; insert it gain when the headset is active. | Dual Connection & Extended Bluetooth Range: Boost your efficiency by connecting two devices simultaneously. Easily switch between computer meetings and incoming phone calls. With a Bluetooth range of up to 33 feet, you can move around during calls and video conferences.【NOTE】Only connect two devices using Bluetooth; don't mix USB and Bluetooth connections to keep things simple | All-Day Comfort: Pamper yourself with our comfortable ear pads, perfect for long-term wear. Adjust the headband for a perfect fit. The flexible microphone ensures clear voice capture. Summoning Siri and other voice assistants is a breeze with the MFB button.【NOTE】The MFB button only work on cell phones, won't answer or reject calls on computers. | Long Battery Life: Our wireless headset comes with a strong 600mAh battery, providing an impressive 40 hours of use after a full charge. Enjoy long periods of use without needing to recharge often. It only takes 2 hours to fully charge the battery, and we include a charging base for your convenience.【NOTE】Turn off the headset before you start charging it