This powerfull stereo speaker gives you the freedom to listen to your music out loud without having to carry around a larger docking station or speaker system. It works with any ipod , MP3 player or other audio device with a 3.5mm headphone jack. Best of all, the speaker folds in half when not in use so it can be easily carried in your pocket, backpack, purse or travel bag. The convenientvolume control enables you to adjust the sound level based on your surroundings. Gold plating improves the signal and helps reduce interference.