The Sennheiser CXL400 Earbud Headphones features Frequency Response 17Hz-21KHz, THD < 0.2 %, Input Impedance 16 ohms, and Sensitivity 113dB S.P.L. at 1KHz
The 1GB USB MP4/MP3/ FM/Voice/Camera w/ Folding 3.0in LCD features: 1GB memory; USB; 3" color screen; NES/GB/GBC format games; MP4; digital video camera; mic; earbuds.