The comfortable earphone allows you to use it for hours, and the discreet microphone on the cord ensures that your voice is heard loud and clear. High-quality microphone on the lead for accepting calls while listening to music and Built-in Microphone featured noise reduction. 3.5mm,With its Dual Speaker, it is carefully designed to enrich your musical senses. The 8mm-tweeter and the 10mm-woofer provide a rich, high-fidelity sound in all registers supported by a deep bass tone. Even better, the slit and the air holes minimize air pressure to ensure a perfectly balanced sound.