This 3.5mm Audio Cable is compatible with most smartphones. Ready to use right out of the package, this cord can be used with both MP3 and MP4 players, as well as your home speaker system. The black audio cable is 3' long, making it portable while also maintaining reach. With a convenient and simple design, this cord can be used in multiple locations throughout your home to connect your audio devices. This product can also be used for traveling with portable speakers. When not in use, it can be wrapped up and conveniently stored inside any drawer or cabinet in your home.