Noise Isolation: Impressive over-ear cup design can effectively isolate environmental noise through passive noise reduction (NOT active noise cancellation), it can enhance the listening experience, make completely immersed in the music world or enjoy the joy of talking with family and friends. Excellent Stereo Hi-Fi Sound: The closed back design provides impressive Hi-Fi sound and 40mm driver together. The clear and quality audio will bring you the deep, powerful and balanced sounds when you listen to music or watch movies. Hand free call & Built in Mic: Rydohi Bluetooth headsets provide a quick and stable connection with your Bluetooth enabled devices like cell phones, tablets, pc, TVs within 33 feet, with a high-quality built-in microphone for hands-free calls, which is convenient for you to free yourself from wires.(ONLY FOR WIRELESS MODE)