Elecom Cute White Shiny Crystal Heart Style Headphone for MP3 Players/MP4/iTouch/CD Players Plug type: straight plug type Sensitivity: 96dB / 1mW Output audio source: portable audio headset Impedance: 18 Headset type: cable wire length:1.2m weight:3g Maximum voltage: 8mW Regeneration frequency:20Hz20kHz It has a unique and original water diamond/crystal design not commonly found on traditional headphones