Jayfi JA30 Adjustable Noise Isolation Heavy Deep Bass In-Ear-Headphone with Microphone and Remote Volume Control Black Adjustable tone-in components design,When the modulation in the "B" position, bass voice will enhance,To "M" modulation positions, headphones sound in balanceModulation to the H position, the hight voice will get the biggest upgrade.You can match the best mode according to the type of music. The earphone shell made of alloy,using CNC technology earphone housing cast molding after 12 processing procedures,let earphone housing shell get the lightweight and rugged features both. 18 cores OFC cable, in particular to add 200D elastic yarn, can withstand 90lb weight,anti-aging, corrosion resistance and other characteristics, the durability of the headset to the new level again. Remote control.compatible System: ANDROID Windows Phone iOS. 1 year warranty