Symphonized MTL Dual Driver Heavy Bass Premium In-ear Noise Isolating Headphones with Mic Symphonized noise cancelling dual driver headphones produce unique combination of deep bass with clean vocals and clear sound MT earphones have dual drivers that produce different pairs of the frequency spectrum Three sizes (s/m/l) of custom silicone ear tips Answer or end calls, activate voice control, skip tracks with a smart built-in in-line microphone With the stylish design and high-end sound quality