Metal In-ear Earbuds Style Headphones For Kindle, Iphone, Ipad, Mp3, Laptops (Black) Noise canceling,Sound Isolating, In-ear Design Attractive, Gorgeous Colors Driver unit: 10.0mm, Diaphragm thickness: 6 Response range: 20-20,000HZ, Impedance: 32 Sensitivity:108 dB, Input: 3.5mm stereo plug