Rock out to big sound in a deceptively small package with the Aerial 7 Sumo Earbud Headphones. The SumoAAAs 16-ohm impedance, 20-20,000 Hz frequency response blows away stock earbuds and provides a hefty dose of colorful good looks, too. A built-in microphone is included for use with mobile phones, and the headphones come with ear gels in three sizes for a custom fit. Product FeaturesMaterial: Driver: 10 mmInput Connection: 3.5 mmCord Length: Frequency Response: Weight: Recommended Use: listening to iPod, MP3, cell phone, or other deviceManufacturer Warranty: 1 year