Durable plug 3. 5mm aux audio conversion compatible mobile phones, computers, tablets, bluetooth speakers, car equipment, mp3, mp4 ideal for connecting portable audio devices, such as an smartphones, tablets and mp3 players, to a car stereo, portable speaker or other 3. 5mm-compatible output. A beveled step-down design allows plugs to be fully connected, even when bulky cases are on your device. Good tensile strength; good weathering resistance; environmental protection. Non-toxic and odorless; has past more than 10000 times flexing test.