M55 Memory sound universal earphones with mic 3.5mm jack with high elastic 1.2m cable one-button operation control1. Earphones speaker: 14.2mm.2. Sensitivity: 98db±3db.3. Earphones audio plug: O3.5mm.4. Earphones cable: high elastic cable with enameled wire. Wire length: 1.2m, weight: 16g.5. Microphone: earphones controller with mic.6. Remote control: functional single button, volume adjustment button, earphones adapted to control Apple and Android.