Universal Compatibility: Play audio from any phone, tablet, iPod, laptop or other media-playing device on your headphones, Hi-Fi or car stereo (fits standard 3.5mm aux ports). Step Down Design: Accommodates SmartPhones & MP3 cases allowing plugs to be fully seated even when bulky protective cases are used. Best Sound Quality: Built with the same grade materials as premium headphone brands. 24K gold-plated contacts ensure the cleanest sound experience possible. Works with any device equipped with standard 3.5mm audio jack or AUX-in port_Connect and play music from your Smartphone, tablet and MP3 player to a car stereo, portable speaker or other 3.5mm stereo audio output. This cable supports devices containing a standard 3.5mm auxiliary jack, which are commonly associated with headphones. Many of today's audio components have this input for easy hookups. Unlike wireless transmitters and cassette adapters, it provides a direct wired connection that's free of static/FM interference. Dual-shielding, polished metal molding and corrosion-resistant gold-plated plugs deliver crisp sounds & minimal signal loss. A compact, beveled step-down design gives a firmly secure connection, even when bulky cases are on your device. You can even charge your devices while in use (separate cable required). You're just a plug-in away from rocking out to your music, listening to a movie or relaxing to an audio-book.