Pyle PIEHIP20BK Ultra Slim In-Ear Earbud Stereo Headphones and Microphone for Cell Phone/iPhone 3G/iPod/MP3 Player (Black) (Discontinued by Manufacturer) 3 Sizes Of Soft Silicone Ear Buds For A Super Comfortable, Noise Reducing Fit Built-in Microphone For Iphone Talk Back Compatibility:IPod/Iphone/Zune/Sansa Models, As Well As Any Audio Playback Device With A 3.5-Millimeter Jack Handcrafted Aluminum Housing And Titanium Drivers For Unparalleled Clarity And Definition Impedance: 32 Ohms Sensitivity: 105dB S.P.L at 1 KHz Frequency Response: 20Hz~20,000Hz Cable Length: 4Ft Plug Type: 3.5mm Stereo Plug Color:Black Sold as : Unit Includes 2 Sizes of Silicone Ear Buds Ultra-Slim Design Excellent Bass Response Frequency Response: 20Hz-20,000Hz 4 Foot Cable Length