Sentry HM271 Talk-Buds Earbuds with Mic, Black Use with cellphones, smartphones, Blackberries, iPods and more with the built-in cellphone microphone Rubber ear-buds; extra set of ear-buds included Stereo ear-buds with built-in omni-directional microphone and 10mm driver for all-around balanced sound Frequency: 20Hz - 20kHz 4 foot long cord with 3.5mm audio jack