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Note: If you use Avantree Faststream codec headphons like Aria , AH6B , NB16 with C81, no need to switch it to call mode. You can get music mode and call mode working at the same time.
Jabra Evolve2 85 Wireless PC Headset with Charging Stand
Note 1.4: It is important to turn your cellphone, PC or any other previously paired-with devices' Bluetooth function off to avoid interference.It is an audio adapter and recognized as a USB sound card / USB speaker when plugged in. No Bluetooth icon will appear on PC.
The best Bluetooth USB adapters for PC in 2023 | Laptop Mag
You should avoid any Bluetooth adapters that are meant to convert 3.5mm devices such as car stereos or TVs to Bluetooth. They invariably have too much latency to be useful for gaming.HASSLE-FREE SET UP - Get wireless Bluetooth audio streaming in no time with the C81. Simply plug it into your device’s USB-C port, set your headphones or speakers to pairing mode, and an automatic connection will be made. No driver or software installation is needed! A converter cable is included if you prefer to use the USB-A port instead.