The Apple iPod nano 4th Gen 8GB (Purple) expands your media horizons with its video playback capabilities in a slim 6.2mm aluminum chassis. Watch your videos on the bright 320 x 240 resolution screen that has an amazing 204 pixels per inch. The iPod nano incorporates a Genius Playlist, which analyzes your current song selection and creates a playlist composed of similar selections found within your music library. With its Click Wheel, shake mode and Cover Flow, the nano is easy to navigate or create instant shuffle mode. The nano includes a powerful lithium-ion rechargeable battery which provides 24 hours of continuous music or 5 hours of video on a single charge.