Tried every  method found on the Internet.

All failed.

Currently can only use 2.4G USB to use.

When trying to pair, its bluetooth can never be recognized by any device.

I found many posts about this issue,

like “Basilisk X Hyperspeed is not entering Bluetooth pairing mode”,

but actually this problem has never be completely solved.

If I cannot solve this problem maybe I would not buy razer products anymore.