Bluetooth dongle and Bluetooth adapter are the terms used to describe Bluetooth receivers, Bluetooth transmitters, and Bluetooth transceivers. It can be confusing since one term can be used for a transmitter and for a receiver so you have to be careful when buying a Bluetooth dongle/adapter and check if the device is a transmitter, receiver, or both. If you are not careful, you may end up with a transmitter when you actually need a receiver.