SEALED NEW HE1 in-Ear Earbuds Noise Isolating Headphones, Waterproof Sweatproof Earbuds for Gym Running with Mic HD Dynamic Crystal Clear Sound, Ergonomic Comfort-Fit and 100% Compatibility Featured with noise Isolation technology, COWIN headphones intelligently filter out background noise for perfect speech transmission in busy and noisy environments and reduces background noise, such as car road noise and air conditioning fans for clearer sound. 3 pairs of ear cups are supplied which isolate ambient noise well when list Hands-Free Calling Now you do not have to stop what you are doing at hand to answer a call. The earphones allow auto switching between music and calls. You can control all functions of music and calls easily via the buttons on the headphones. Enjoy a cheerful chat with your friends while you are doing your office work, housework, gardening, or particularly when you are driving along the fast lane.