Works with current and futuer Xbox 360 wireless accessories.
Uses intgrated 2.4Gigahertz (GHz) High-performance wireless technology that lets you operate a wireless device from up to 30 feet away
Lets you use up to four wireless controllers and four wireless headsets together with one wireless gaming receiver
Connects to a powered USB 2.0 port on a computer
Includes a six-foot USB cable
Cable length: approx 1.8m
Color: black
Dimension: 75*42*19mm

Package dimension: 192*138*48mm
Package weight: 130g

In Windows 7, this is the process to installing the gaming receiver:

First, download the latest driver from Microsoft
Go to Control Panel>Hardware and Sound>Devices and Printers
Right click on "unspecified Device"
Click on "Properties"
Click on the "Hardware" tab
Click on "Update Driver"
Click on "Browse my computer for driver software"
Click on "Let me pick from a list..."
Select the Microsoft Controller.
Then select the Xbox 360 Wireless receiver for Windows Version 2.1.0.1349 [4/8/2009])

Package include: F1201B
1* XBOX 360 PC Wireless Gaming Receiver