PX 30 Sennheiser Headphones is ideal for those on-the-go who have MP3 and/or XM Satellite Radio receivers. The PX 30 is an open, dynamic, supra-aural mini headphone. The balanced sound reproduction easily outperforms conventional mini headphones. The PX30 by Sennheiser is a great, affordable compliment to any satellite receiver, bringing customers the quality of sound that is both expected and we feel essential for those who want the best sound around. Package Details: Includes: • Headphones • Cable length: 3 feet Product Features: Compatability: Great for use with portable audio devises Optomized: Optimized for rock and pop music Sound: Excellent reproduction, transparent, bass-driven sound Bass: Bass tube for rich, full bass Light: Lightweight and comfortable for music on the move Connector: Connection cable made from highly conductive OFC copper Warranty: 2 Year Parts and Labor Nominal Impedence: 32 Ohm Cable: Lenght: 3 feet Ear: Ear coupling Supraaural Transducer Principle: Dynamic, open Jack: Jack plug 3, 5 mm stereo Frequency Response: 30.....20000 Hz Sound Pressure Level: Jack plug 3, 5 mm stereo THD: Total harmonic distortion < 1% Technical Specifications: Model #: PX30 Manufacturer: Sennheiser Weight: 2 lbs. Available Documentation: In order to view our radio hardware manuals online, you will need to have Adobes Acrobat Reader installed on your computer. If you dont yet have Acrobat Reader, please visit Adobes web site to download the reader free of charge. PX30 Sennheiser Headphones User Guide (n/a)