FIDUE A81 In-Ear Noise Isolating Earphones Heaphones with High-End Super Dynamic Driver Comes with a 10mm advanced, high end Dynamic driver with Titanium Composites Two kinds of Interchangeable, adjustable ear-hook design as well as two kind of detachable cables Unique Water-Drop-Shaped Design and bunches of eartips for comfortable wearing Clean, clear and balanced Super Dynamic Hi-Fi Sound Quality Work with over 95% of headphones around the world