Specifications: - This battery pack cover for Xbox 360 is compatible with all standard Xbox 360 controllers. - All you need is two (2) AA batteries (not included), and you're ready to play. - Xbox 360 Controller Battery Cover - Batteries: 2 x AA (not included) - Size: 2 1/4" x 1 3/8" - Color: Black - Package Contents: 2 x Battery Pack Cover for Xbox 360 What's in the box 2 x Battery Pack Holder for Xbox 360