Comply NR-10i High Tech Noise Reduction Earphones take the hands-free iPhone experience to the next level! Designed for the iPhone, and incorporating the same technology used by military pilots to reduce noise interference, Comply NR-10i earphones provide superior noise reduction, amazing comfort and a secure in-ear fit to deliver crystal clear communication and enhanced listening experience. Sound Engineering: Comply NR-10i was engineered to maximize noise reduction, obtaining a Noise Reduction Rating (NRR) of 29db! The included Comply Foam Tips P-Series were engineered to take the shape of an ear canal by gently expanding and remaining in place. Comply Foam Tips are made of high-tech, viscoelastic polyurethane foam developed for the ever-changing ear environment. Convenient Microphone/Function Switch: Comply NR-10i earphones have an integrated microphone and function switch on the cable, allowing users to answer and end calls, play, pause and skip songs with the touch of a button.