Corrected entry: In the first part of the film, Jack's iPod switches from an early model with four buttons at the top to a later model with a click wheel.
Corrected entry: The Bose iPod player Jack uses cannot be used on batteries. However, it plays while the boys are sitting around a fire in the wilderness, with no power outlets around.
Correction: The portable version (available in black or white) uses Lithium Ion batteries. See: http://www.bose.com/controller?event=VIEW_STATIC_PAGE_EVENT&url=/home_entertainment/sounddock_systems/sounddock_portable/features.jsptabs.
Correction: In every shot it appears in, it has a click-wheel. The wheel is less visible early on as there is more light in the room, so the wheel seems almost as white as the rest of the unit. In lower light, the wheel stands out a bit more as if a light gray.
johnrosa