Axess EP108-RD Boombug High quality earphone, ergonomic sound isolating technology, compatible with iPOD, iPHONE, iPAD and all audio and media devices with a 3.5mm jack &ndash; Red Ergonomic sound-isolating technology, Multiple size ear tips for comfortable fit Compatible with iPOD, iPHONE, iPAD and all audio and media devices with a 3.5mm jack Speaker: 10mm 6u, Frequency Range: 20Hz - 20KHz Impedance: 28 +5, Sensitivity: 105dB+5dB Max Power: 10mW