FREE: Bluetooth wifi USB

I forgot to ask this is to use WiFi on a desktop computer right

Nope this is for bluetooth
if you don't want it you can use the pics and description and sell it on Ebay

Bluetooth is a standard wire-replacement communications protocol primarily designed for low-power consumption, with a short range based on low-cost transceiver microchips in each device.[15] Because the devices use a radio (broadcast) communications system, they do not have to be in visual line of sight of each other, however a quasi optical wireless path must be viable.[5] Range is power-class-dependent, but effective ranges vary in practice; see the table on the right.

hoping this will help all of you to understand what a Bluetooth is use for .

List of applications
A typical Bluetooth mobile phone headset.

Wireless control of and communication between a mobile phone and a handsfree headset. This was one of the earliest applications to become popular.
Wireless control of and communication between a mobile phone and a Bluetooth compatible car stereo system.
Wireless control of and communication with tablets and speakers such as iOS and Android devices.
Wireless Bluetooth headset and Intercom. Idiomatically, a headset is sometimes called "a Bluetooth".
Wireless streaming of audio to headphones without communication capabilities.[22]
Wireless networking between PCs in a confined space and where little bandwidth is required.
Wireless communication with PC input and output devices, the most common being the mouse, keyboard and printer.
Transfer of files, contact details, calendar appointments, and reminders between devices with OBEX.
Replacement of previous wired RS-232 serial communications in test equipment, GPS receivers, medical equipment, bar code scanners, and traffic control devices.
For controls where infrared was often used.