?Worry-free After-sales Service?Wireless Headset for computer has 3 years warranty, 24 hours customer services and professional technology teamservices.so please do not hesitate contacting us if there is any after-sale issue. ?Comfortable and Mutifunctional Base Design?Soft and breathable earmuffs ensure a all-day-comfort wear experience. Adjustable headband fits into any head shape without slipping off your head, great for glasses wearers. The charging base with USB A interface can charge wireless headset for work and other USB A interface devices. The grooves are designed to hold small items such as u-disks and earplugs, enjoy your small storage box. ?Long Battery Life?Wireless Headset with charging base that can be fully charged in 2 hours, and offers up to 20 hours of talk time and 7,200 hours of standby time. A plug-and-play offer you an effortless charging experience, ideal for audio calls where you can focus on the task at hand, without worry no power. Also adding stylish and elegant for your office. ?Wireless Headset with Microphone & Smart Mute?Rotating mic boom can auto toggle mute without clicking button. Rotated the mic boom upwards, the mute is automatically on. Rotated the mic boom down to your mouth, the mute will automatically off. The bluetooth headset with microphone frees you from frequent keystrokes and gives you the freedom to switch between calls and privacy. 270°Rotating mic support left or right ear. ?Bluetooth Headset with USB Dongle?The wireless headset with USB dongle and can be connected to devices without Bluetooth capabilities. Just plug the USB port into your computer, turn on the computer headset, then pair up automatically. Qualcomm chip and Bluetooth 5.0 provides a more stable connection and compatible with cell phones, laptops, computers and other Bluetooth devices. Perfect for computer, call center, office, online class, Skype, Zoom, Google Conferences, etc. ?AI Noise Cancelling Headset?Built-in DSP,CVC8.0 and AI noise cancellation technology, eliminating up to 99% of the noise and echo on calls. The wireless headset with microphone allows you to enjoy a clear and unobstructed wireless mobile phone and the freedom of music while you drive, run or work. NOTE: NOT ACTIVE NOISE CANCELLING!.