In-ear Diaphragm Headphones - Black (Discontinued by Manufacturer) In-Ear Headphones With Extraordinarily Articulate Audio Direct Diaphragm Mount For Precision Audio Reproduction 12.5Mm Rare-Earth Drivers 2-Ft Cord With 3.3-Ft Extension 12.5mm rare-earth driver diameter 5-24-000 Hz frequency response 200 mW maximum input power 104 dB/mW at 1 kHz sensitivity 16 ohms