Belkin USB Bluetooth Adapter

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 latest 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.

Installing the device on Windows 7
Most Belkin Bluetooth USB adapters install automatically without any extra software on Windows 7.  Simply plug the device into a spare USB Slot.  Windows 7 should automatically recognize the device and install the necessary drivers and software.
If you encounter any issue's with this then you can try installing the latest drivers from the chipset manufacturer - http://www.broadcom.com/support/bluetooth/update.php

Can I use Belkin Bluetooth adapters on my Apple computer running MAC OS?
As long as the Apple computer in question is running Mac OS 10.2 or later, then the necessary Bluetooth drivers are built into the operating system.  All you should need to do is plug it in and you should be able to use Bluetooth.