DESC: No speaker for your iPod or iPhone can deliver the enviable sound output than the Altec Lansing Mix Digital Boombox Speaker System for iPod and iPhone. And it's portable too! It comes with an AC adapter for home use. But you can option 8 D Batteries to take it with you to the park, camping, or bring to your friends house. Highs are delivered from Dual 1 horn-loaded polypropylene tweeters. Midrange uses dual 3 mid range drivers. Getting those lows you've always dreamed about requires the built-in 5.25“ subwoofer and 5.25 passive radiator cone that delivers bass that's true and rich. There's a universal dock ready to accept your iPod or iPhone. The Mix Digital Boombox is a worthy stereo system for you.For tweaking the sound, there are multiple EQ modes, including a 7-band graphic equalizer, four EQ presets, and separate bass and treble controls.