1. Wired earphones speaker: 10mm, connector: 3.5mm, thus earphones are universal. 2. Earphones impedance: 16Ω±15%. 3. Frequency response: 20~20000Hz. 4. Sensitivity: 93db±3db. 5. Material: high elastic cable with enameled wire, cable length: 1.2m. Weight is only 12g, therefore earphones are portable and convenient to use. 6. Microphone: controller with mic. 7. Wire control: functional one-button operation control, adapted to control Apple and Android, so you can control music and calls.