IE45 Short ear tips has adopted "Asymmetric Distributed Dot" structure which could reflec sound orderly, suppress the clutter of voice, then output a clear and natural sound. Dot structure could soften the irritation of high-frequency, and make it sound a warm, gental, and mellow voice. Sound style: mellower voice and larger bass response than IE45 Short Pro, however slighter leakage of high-frequency details. Hardness: 30 degree outer layer umbrella, slightly harder than Short Pro.