Color: White, Black Material: aluminum alloy TPE+PC Speaker size: 9mm Impedance: 16Q+/-15% Wire length: 1.2m/3.9ft Way of wearing: In-ear style Frequency response range: 20Hz ~ 20KHz SPL: 91 +/- 3dB Interface type: 3.5mm Microphone sensitivity: -48+/-3dB Size: 1200*10*10mm/47.24*0.39*0.39"" Weight: 20g handsfree