Base booster 4 in 1 dynamic stereo headphone Audio cable with built-in mic to talk hands free. Compatible with iPhone, Blackberry, Tablets and other mobile phones with 3.5mm jack. Fashionable, comfortable, lightweight and easy carry with super soft earpads. Soft earpads for long comfortable wear. Noise suppression, echo elimination and duplex sound. Ideal design for sports, indoor/outdoor activities and music lovers. Best for listening music, internet and mobile communication.