Audio Technica ATH-CKM500 BK | Inner Headphones (Japan Import)<br /><br />Dynamic Inner-ear Headphones with 12.5mm Drivers<br />Driver: 12.5mm/ Frequency Response: 5-25/000Hz/ Impedance: 16ohms<br />Max Input: 200mW/ Output SPL: 105dB/mW/ Weight: 7.4g (w/