The XM Travel Audio is a perfect companion for your Samsung NeXus , Samsung Helix , Pioneer inno , or other XM2go Satellite Radio Receivers with MP3 playback. It lets you play your music out loud when you re on the go - whether you re traveling far from home or just going to the park. You ll get sparkling, high quality audio wherever you are. The included carrying case not only protects your XM Travel Audio, but provides a convenient holder for your radio while you re using it. The included AAA batteries give you up to 35 hours of play time.