32gal and i spli the cost on a Bose sound deck.Its portable, lightwieght, and can be used anywhere. It also has fantastic sound !~! Ive had it in the Coupe and yesterday in the Roadster............perfecto. Neither one of us wanted a pemanent installation but felt for long road trips it would be nice to have some "tunes"
Its battery powered{lithium} and will run for 8 hrs. Its recharable ,just plug in to any ac outlet. I have about 30 cd albums downloaded already. It has the best sound ive ever heard. Cost is pricey, about 600{399 for the sound deck and then you have to buy the i-pod of your choice. It kicks ass..........small, and lightweight.