With today's world revolving so much around mobile devices, this 3.5mm Male to 2.5mm Male Speaker/Headset Cable is an essential tool to have at all times. Works with smartphones, tablets, MP3 players, laptops, and other portable audio devices with a 2.5mm or 3.5mm audio jack. Simply connect the 2.5mm end of the cable to your 2.5mm headphone jack, and the other to the 3.5mm input of your car stereo, portable speaker, or other compatible device or vice versa. Whether you use it when you're on the road, or in the comfort of your home, you'll always be able to listen to your favorite tunes.