Etymotic ER-4PT - high quality single driver in-ear phone especially for live applications, detailed and clear sound throughout the complete frequency range, 50Hz-10kHz (+/- 2dB), 20Hz-16kHz (+/- 4dB), 122dB max SPL, black plastic housing, removable cable with angled stereo mini-jack plug. Includes different sized ear pads, bag, plastic case, jack adapter, airline adapter and cable clip.