i bought a couple of these to use to hook up to my LG Octane to my car stereo using a 3.5mm male jack.LG Octane---2.5mmTo3.5mmAdapter---3.5mmMaleJack---CarStereohowever, only one channel comes out (ie. only hear one side when using headphones). bummer!i bought the nokia ad-61 (also found on amazon, but, more expensive) and works to produce stereo sound (ie. you can hear both left and right headphones).you might have better luck than me in getting sound out of this adapter but they didn't work with my phone.