Hear Every Detail - 40mm dynamic driver with LDAC codec for Hi-Res Wireless audio, delivering 3X more detail than standard Bluetooth transmission for punchy bass and crisp treble Reduce Noise By Up to -45dB - 5 noise cancelling levels can be adjusted for optimal noise reduction, Whether you're indoors, cycling, commuting, or on a flight. Staying aware of your surroundings with the Transparency Mode Ideal for Traveling - 54 hours of ANC playtime will cover an around-the-world flight without needing to recharge. In normal mode, get up to 94 hours of playtime and if you are low on battery, charge for 15 minutes for 10 hours of playtime Bluetooth 5.4 Multipoint Connection - Newest Bluetooth 5.4 support dual device connection for instant switch between work and entertainment DNN Crystal Clear Call - 5 built-in microphones with DNN noise reduction technology intelligently separates human voices and amplifier your voice for clear, crisp communication during calls or voice commands More Than Comfort - Feature a unique biaxial rotation and foldable design for multi-angle adjustment. Soft integrated protein ear cups and stable steel headband crafted for natural prolonged wear Edifier W830NB -45dB Active Noise Cancelling Headphones Bluetooth 5.4