TP-Link USB Bluetooth Adapter for PC 4.0 Bluetooth Dongle (UB400) is the only option available in India for Bluetooth connection in PC from a good brand. It cost me Rs. 450.
The size of the Bluetooth adapter is small, and it is quite easy to install. Just plugging it into the USB port makes it work.
Bluetooth range is good for a Bluetooth 4 adapter but obviously it cannot match a Bluetooth 5 version.
There is only SBC codec support and no AAC, AptX or any other good Bluetooth codec which are necessary for more than decent music quality.
Connection quality is great and reliable with no connection drops at all during my testing. It comes with 1-year warranty which is decent for the price.
So, buy this TP-Link USB Bluetooth Adapter for PC 4.0 Bluetooth Dongle only for simple file transfer, connecting peripherals (mouse or keyboard) or basic music listening. Do not anything more than that.