Features:Apple 12W USB Power Adapter MD836BA Desktop AccessoriesApple USB Power Adaptor12W powerColour: WhiteProduct Dimensions: 8.9 x 3 x 63.5 cm ; 118 gBoxed-product Weight: 118 gThis power adapter recharges the lithium polymer battery while the system is off, on, or in sleep mode. It also powers the system if you choose to operate without a battery.