The easiest way to add Bluetooth to a laptop that does not have it already built in is by a Bluetooth adapter. Bluetooth adapters connect via USB and are generally inexpensive.
Bluetooth adapters are small USB-enabled sticks that allow users to wirelessly transfer files from computer to computer and connect to other Bluetooth-enabled devices. These devices include wireless headsets, mobile phones, keyboards and wireless mouse devices, according to Microsoft. Before purchasing or adding a Bluetooth adapter to a laptop, users need to check the Bluetooth adapter's specifications (usually listed on the box or official website) to confirm its compatibility with the laptop. Range and wireless speeds vary depending on the Bluetooth adapter and other factors such as distance and interference from other wireless devices.