This Microsoft controller connects to your Xbox with a 2.4 GHz wireless connection, giving you a seamless game play experience. The controller can be detected to up to 9 metres away, so you can use this gamepad in a large hall during tournaments with the same comfort as gaming at home with your friends. The gamepad is powered by 2 AA size batteries are easily replaceable. This Xbox controller needs 128 MB RAM and 150 MB hard disk space to function at optimal levels. The Wireless Windows controller has an ergonomic design and is slim enough to fit conveniently in the palm of your hands. This promotes easy playing and reduces fatigue. The endless hours of gaming will no longer be filled with discomfort. The buttons are also easily accessible without having to reach over a large gamepad. The wireless controller features a new button layout, with the right analog stick shifted inwards. This puts both analog sticks close to each other and makes them easy to reach in the middle of a game. The 8-way D-pad increases your accuracy in turning and aiming. The standard multi-purpose action keys are named A, B, X and Y, and are placed at a comfortable distance from each other. The Guide button on this gamepad is backlit and is hemmed in by the Start and Back buttons. This Guide button has quadrants, which light up individually, corresponding to the player you control and lets you access your game card at any time during game play. This gamepad also features the new Sync button which lets you communicate with your console if it is not identifying your controller. The 2 bumpers and 2 triggers on the shoulder complete the controls of this gamepad, and give you a superior experience while destroying aliens and villains. You will find a 2.5 mm standard headset jack on the bottom of this controller, which will let you attach any standard set of headphones to this gamepad. This way, you can enjoy your loud games while avoiding disturbing anyone around you. This also lets you access the Xbox Live play options with this controller. This Xbox controller is supported on Windows 7, Vista, or XP with Service Pack 2 and requires a Pentium 300 MHz processor or higher for optimum functioning. The Microsoft controller will therefore let you game in comfort and style.