Reduce Noise By Up to 90% The Soundcore Q21i NC'I noise canceling headset effectively blocks sounds in real time using hybrid active noise canceling technology. Hi-Res Certified Sound Hi-Res certified audio means you can listen to wireless music with better quality than a CD. Large 40mm drivers can also produce clear sound and powerful bass. Ideal for Cruises and Trips You can discover more with 40 hours of playback time when the ANC is on and 60 hours when the ANC is off. Even if you are in a hurry and your charge level is decreasing, a 5-minute fast charge allows you to travel more peacefully for 4 hours. The Soundcore App Personalize your listening experience with the customizable EQ in the Soundcore app, get more enjoyment with features such as white noise for relaxation. Transparency Mode Switch to transparency mode to connect with your surroundings without removing your noise canceling headphones. If you want silence, you can easily switch between noise Deceleration and normal mode. Dual Device Connection Connect to two devices at the same time for extra convenience. Headphones with noise canceling feature will automatically switch to the device that is playing audio at that moment. Long-Term Comfortable Listening Multi-angle rotatable ear cups allow you to wear your Bluetooth headphones at any angle. The breathable mesh prevents your ears from sweating, and the memory foam pillows adapt to the shape of your ears, providing long-term comfort. Hands-Free Calls Your hands are full, but you're getting a call? Press the button on your Bluetooth headphones and the built-in microphone will pick up your voice clearly, so you can talk comfortably. Note: ANC mode is not compatible with AUX cable. According to the rules, the maximum volume level of the headphones should not exceed 100dB. To protect you, the maximum volume of the Q21i NC is set to 95dB. It is recommended not to listen too loudly for a long time