1. Speaker: 10mm. 2. Impedance: 32Ω±15%. 3. Frequency response: 20~20000Hz. 4. Sensitivity: 92db±3db. 5. Audio plug: O3.5mm, weight:13g. 6. Headphone cable: TPE high elastic with enameled wire, length: 1.2m. 7. Microphone: controller with microphone. 8. Line control: one-touch operation, control music player + answer the phone, up and down song switch, control for Apple and part of the Android system.