Atomic Pico bluetooth dongle.

Belkin Bluetooth Dongle.
This adapter simply plugs into one of your computer's USB ports, and with just a press of a button, quickly connects you to the Bluetooth wireless technology. The Bluetooth Adapter easily pairs your mouse and keyboard to your computer, and also communicates with headsets, printers, phones, and other devices enabled with Bluetooth technology.

Belkin Mini Bluetooth Dongle.
Low-profile design stays connected to your laptop for quick and easy Bluetooth connections. This small adapter simply plugs into one of your laptop's USB ports, quickly connecting you to the latest Bluetooth wireless technology. The Mini Bluetooth Adapter communicates with mice, headsets, printers, phones, and other devices enabled with Bluetooth technology.

Bluetooth Dongle 3.0 - Class 2.

Mini USB Bluetooth Adapter
Bluetooth version 3.0

USB bluetooth adapter with software.
Stereo bluetooth USB 2.0 class 2 adapter with support for high-speed data transfer.

Micro USB Bluetooth Dongle.
This is a micro-sized USB bluetooth dongle.

For the data transfer via bluetooth. The dongle can by connected to the USB port of the PC. Multiple simultaneous Bluetooth connections.

Mini Nano USB Bluetooth dongle.

The Nano USB Bluetooth Dongle is an ultra small, technologically advanced wonder. It uses advanced technologies - Bluetooth v2.0 + EDR and USB 2.0 - to provide you with faster connections, enhanced voice and multimedia quality, and up to three-times-faster data-transfer speeds than v1.2. Now you can add Bluetooth wireless capabilities to your P.C or notebook computer.