When purchased through the online Apple Store, the iPod featured custom engraving: a purchaser could have two lines of text laser-engraved on the back (for an additional charge).
iPod offers FireWire and USB 2.0 connectivity (except for iPod shuffle, which only supports USB). iPod recharges its internal battery while it is connected to a computer. A user can also recharge an iPod using the included AC wall plug, which connects to the iPod via FireWire. The wall plug recharger uses the FireWire cable to transfer only electrical energy. (USB charging works only with post-third-generation models.)