L1 sports earphone $ 7.72 Earphone type: earphone Wearing mode: ear hanging type Headphone output source: communication equipment Plug diameter: 3.5mm Plug type: in line Wireless headset: wired headset With or without microphone: Yes Sound production principle: moving coil Frequency response range: 20-2000 (Hz) Impedance 32: () Sensitivity: 11153 (DB) Distortion rate: 3% Conductor length: 1.25 (m)