The i.Sound 2x Power may be small, but it delivers a crisp, big sound thanks to its pair of stylish drivers and built-in Class D amplifier. The easy portability makes the speaker system a great companion in the garage, on the back patio, or at a friend's barbecue. The handiest feature, however, is the i.Sound 2x Power's folding design, which collapses into a compact footprint and fits seamlessly in a suitcase, backpack, and virtually any other storage bag. The black i.Sound 2x Power, which runs on either four AAA batteries (not included) or AC power (adapter included), carries a 120-day warranty.