Smabat M0 Module Earbuds Flat Earphones 15.4mm Titanium plating Film Driver Module upgrade 3.5mm HeadphoneDrive unit: 15.4mm titanium plated unitImpedance: 20ΩFrequency: 10Hz-22kHzSensitivity: 110±3dBPlug type: 3.5mmCable length: 1.2meter