The TuneIt FM transmitter plugs into the 3.5mm jack of your iPhone, Smartphone or other mobile devices to provide a clear and crisp audio signal through your car stereo. Use the integrated aux cable to plug the TuneIn into the headphone jack of your device. * Built-in 3.5mm Cable * 3-Station Programmable Memory * Flex-Neck text or email 306-527-6856