A beveled step-down design allows plugs to be fully connected, even when bulky cases are on your device. Sturdy 3.5mm plug AUX audio conversion compatible with 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 devices. Non-toxic and odorless boasting durable tensile strength proven by passing more than 10000 times flexing test from product samples.