AT&T PEBM01-BLK Stereo In-Ear Earbuds with Microphone and Tangle-Free Cable, Black Stereo earbuds with flat, tangle-free cable and built-in microphone 10mm driver Speaker imp: 32 ohms, Frequency: 20hz-20kHz Soft silicone ear buds provided for a super comfortable, noise reducing fit Industry-leading 3.5mm Jack Connectivity technology : Wired