Protect and play your portable player! The Memorex Portable Speaker+Case zips around most MP3 players and smartphones so you can keep your player safe while listening to your favorite music. Its universal line-in jack lets you connect any music device with a 3.5mm headphone jack—from iPod, Zune and other MP3 players to Android, Windows and other smartphones. Features stereo speakers for high quality audio and external volume controls. Requires four AAA batteries.