The iPod Building Block Speaker is one of the coolest iPod accessories we've seen in a long time. This LEGO-inspired mini speaker turns almost any iPod into a portable boom box allowing you to "share" your music with anyone within earshot. Dock connector ensures compatibility with nearly all iPods. Volume up / down buttons are disguised as "connectors" on the front. The iPod Building Block Speaker is a miniature set of stereo speakers featuring an iPod Dock connector. This means it's compatible with almost any iPod that uses a Dock connector. Just put your iPod on top of the speaker and hit 'Play'. No batteries are required to turn your iPod into a miniature, portable boom box. Please note that if your iPod has a built-in speaker (newer versions of iPod Touch, for example), the iPod Building Block speaker will not work with it. So, if you can listen to music on your iPod without inserting headphones or hooking it up to a speaker, then your iPod has a built-in speaker and the iPod Building Block Speaker will not work with it.