Pyle PHRT32BK Ultra Slim Super Bass Retractable In-Ear Earbud Stereo Headphones for iPod/MP3/Any Media Player (Black) (Discontinued by Manufacturer) Compatibility:IPod/Iphone/Zune/Sansa Models, As Well As Any Audio Playback Device With A 3.5-Millimeter Jack Mini Retractable Earbud Set 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 Retractable Cord Ultra-Slim Design Excellent Bass Response Frequency Response: 20Hz-20,000Hz 4 Foot Cable Length