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.