Logic3 iStation Traveller Portable Speaker System (Green) Portable green speaker system for iPods, MP3 players, PSPs, and mobile phones Pair of full-range 1.25-inch drivers combine to produce crisp, rich sound Includes 3.5 mm-to-2.5 mm stereo converter for connecting cell phones Folds up to save additional space; runs on 4 AAA batteries (included) Measures 5 x 3.25 x 3.25 inches (W x H x D) when folded; 1-year warranty