Professional Active Noise Cancelling Technology. Significant noise reduction for travel, work and anywhere in between. Advanced active noise reduction technology quells airplane cabin noise, city traffic or a busy office, makes you focus on what you want to hear,enjoy your music, movies and videos. The noise cancellation function can work well both in wire and wireless mode. Proprietary 40mm Large-aperture Drivers. Deep, accurate bass response. The Active Noise Cancelling around-ear headphones from COWIN give you crisp, powerful sound and quiet that helps you enjoy your music better. The goal that provide Customers with better sound quality, is our constant pursuit. High-quality Built-in Microphone and NFC Technology. COWIN E7 provides high-quality built-in microphone for hands-free calls, Which is convenient for you to free yourself from wires. NFC pairing aided by voice prompts, promises quick and stable connection with your Bluetooth enabled devices, Powerful Bluetooth Function.