Yealink UH38 Bluetooth USB Wired Headset with Microphone Stereo for PC Computer Headset Telephone Headset Teams Certified with Noise-Canceling with 360° Busylight About this item 【Dual Connections of USB and Bluetooth】 - Industry pioneering dual connection design, available for both USB and Bluetooth connection simultane ously, delivers an immersive and coherent voice experience for all users during working. Users can connect and manage two kinds of call devices simultaneously, thereby realizing the seamless switching between PC and mobile device, and improving call processing efficiency. The Bluetooth wireless distance can reach 10m (33 feet). 【Call Controller with Build-in Battery】 - UH38 Dual headset can be powered by the built-in rechargeable battery when in Bluetooth mode, which combines the reliability of wired headsets and the flexibility of wireless headsets. Of course, the 360° busy light is essential, with it, when you are on a call, it will automatically emit red light to reduce external interference and improve work efficiency 【Skin-friendly and Soft Headband & Ear Cushions】- UH38 Bluetooth Headset is well-built with a sturdy-feeling design made of high-grade plastic reinforced by a metal frame. The skin-friendly material, soft memory foam, combined with the ergonomic ear-fitting design, brings you a comfortable all-day experience. 【Dual Noise-Canceling Microphones】 - The dual-microphones noise cancellation and Acoustic Shield Technology can effectively resist the noise interference of the surrounding environment, greatly reduce the background noise during the call. It helps improve the clarity and quality of the call and bring the ultimate calling experience. It is worth mentioning that by raising the microphone boom can also adjust the mute 【Phenomenal Audio for Call and Music】- UH38 Dual Connections Headset supports dynamic EQ to switch call mode or music mode automatically. You can enjoy clear and natural sound quality in call mode, spacious and detailed sound quality in music mode. The new angled ear cushion design and oval memory foam and artificial protein leather isolate the ambient noise, bringing excellent passive noise reduction and creating the best listening experience.