How to write a fraction bar on a Macbook?

Hello, I recently bought a Bluetooth adapter for my PC. The problem is when I connect my headset to it the sound is great for the first few minutes, but then it becomes tinny and very bad. My question is whether this can be fixed somehow It's this one: https://www.mediamarkt.de/de/product/_tp-link-bluetooth-usb-ub5a-nano-usb-adapter-schwarzgold-2803451.html?storeId=487&utm_source=google&utm_medium=cpc&utm_campaign=RT_shopping_na_nsp_na_PLA+-+bluePortal+2+PMax&gad_source=1&gclid=CjwKCAiAh6y9BhBREiwApBLHC6FjIsMzcWLcGDGZv1s3xRwTgfQxNhri5L0Ha6JNLrz5kAffLR7ykxoCoIAQAvD_BwE&gclsrc=aw.ds