3.5mm Jack - Secure fit and easy removal from your devices. Microphone - Hands-free earphone with in-line microphone and volume control function design for mobile phone users, allows you to mute the music to answer a call directly from the headphones. Anti-Tangle Flat Cable - Burst Out innovative flat series cable reduces tangling and has been specially engineered to ensure a crystal clear sound quality. Extreme Bass - Featuring Burst Out's specially engineered "Fast Response" driver technology for smooth punchy bass and rich, accurate full-range sound. Volume Control - High sensitive volume control easy to adjust sound level Noise Isolation - In-ear isolation design blocks external noise.