The Aerial7 Bullet Earbud Headphones are probably called the Bullet because they shoot your auditory cortex with a wave of passionate, love-making, saxophone-heavy jazz music. Or perhaps some eyeball-popping metal with chunky bass riffs and some angry white guy screaming about how screaming is more your thingAAAeither way, the Bullet is pretty awesome. Product FeaturesMaterial: Driver: 10 mmFrequency Response: 20 KHzInput Connection: [3.5 mm]Cord Length: Weight: Recommended Use: Listening to musicManufacturer Warranty: limited lifetime