In-Ear Earphones / Noice Reducing / Stereo Sound / Compact Size / White and Grey Colored / Light & Comfortable Core Length: 45 inch, Speaker: 10 mm Impedance: 32 hms, Sensitivity: 92dB 1mW, Plug Type: 3.5 mm Max Range: 30 mW Frequency range: 20 - 20 KHz