The Pyle PSBU9 Portable Bookshelf Speaker broadcasts your favorite music in any room of your house. And when you're ready to move to another room, just pick it up and go! The rechargeable battery makes moving a cinch - just plug it to the 5 V charger when you need more juice. You can listen to MP3s from your USB sticks and SD card, or plug in virtually any digital music player using the 1/8" aux-in jack, like an iPhone, iPod, or Android smartphone. There's also an FM radio to tune your favorite stations. A remote control makes operation a breeze.