Stereo Earphone .For MP3, MP4, Walkman, CD, Radio, iPod etc. .Speaker Size: 15mm .Cable length: 1.2m .Plug: 3.5mm stereo Stereo EarphoneSpecifications:Frequency response:20-20,000hz Speaker Size: 15mmImpedance: 32 ohms±15% Sensitivity: 108dB±2dB/mW Rated power: 5mW Plug: 3.5mm stereo Cable length: 1.2m