GranVela LK-i6 Dual Axial Dynamic Drives Hi-Fi In-Ear Earphones Monitor Headphones with Microphone for iPhone, iPad, Android and more 9.0mm Neodymium Driver dual cavity drive units-ensures full-frequency response across a wider frequency range from 8 Hz to 26000 kHz. Low impedance, can be easily driven. Ribbon of flexible, durable and Silver plated copper wire enabling efficient transfer of signal and minimum interference. Excellent performance at the mid and high range. Designed for pop, great preparation, vocal, classical music and the music of instrument playing. Ergonomic offset nozzle design, with small rounded on-ear driver housing and shallow in-ear nozzles, ensuring long term wearing comfort. Fascinating vocal & impressive sound stage performance.