Mutant Media YoYo Portable Speaker with Built-In Battery， Green<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Portable pocket sized YoYo shape for easy carrying </span></li><li><span class="a-list-item"> Expendable diagram to enhance bass sound effect </span></li><li><span class="a-list-item"> Retractable 3.5mm audio jack makes it compatible with iPhones， iPods， and most MP3 players. </span></li><li><span class="a-list-item"> Glow LED power indicator ring adds night time ambiance </span></li><li><span class="a-list-item"> Built-in rechargeable Lithium Ion battery for extended play without other power source </span></li><li><span class="a-list-item"> iPhone， iPods， &amp; More </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51pvuNzILFL.jpg" noproxy>