Coby's deep bass headphones deliver great, resonant lows, providing a premium listening experience. Adjustable headband lets you experience your music in complete comfort, while a compact folding design makes for easy storage and portability. Combined with Coby's mini MP3 speakers delivers crisp sound. Features. High-performance neodymium driver units deliver deep bass sound. Padded headband for maximum comfort. Compact folding design for easy carrying and storage. Adjustable headband for maximum comfort. Gold-plated 3.5mm stereo plug Mini MP3 Speakers. Active system with power control High efficiency twin micro drivers delivers outstanding audio output power. 3.5mm stereo plug for use with any portable audio device. Compatible with iPod Operates on 1 x AA battery (Not included)