iFrogz Flex Sport Over the Ear Earbuds with Microphone - Black/Pink The Flex also features an in-line single button mic/remote for phones and mobile devices. Single button remote/microphone is compatible with Apple, BlackBerry, Android and all other media devices with a 3.5 mm jack Driver Unit: 16 mm neodymium, Impedance: 104 ohms Sensitivity: 320 dB +/- 3 dB at 1 kHz, Frequency Response: 20 Hz to 20 kHz, Cord Length: 1.2 m Noise-isolating tips. Connectivity Technology: Wired