Advanced ANC technology: Bluetooth noise cancelling headphones adopts the latest noise reduction technology, which is a combination of active noise reduction and passive noise reduction. One touch to turn on the ANC function,when the indicator light is on,bluetooth headphones noise canceling can detect and cancel a wider range of low-mid and low-frequency noise, providing you with excellent sound performance - clear high and low bass. 40H Playtime: Over-ear headphones work for 2 hours after 5-10 minutes of fast charging via USB-C, and you can get up to 40 hours of wireless battery life on a single charge. Foldable and Portable Sound Cancelling Headphones: Noise cancellation headphones weigh 0.41l pound. You can fold headphones into a smaller volume and then put them in a travel bag to take with you wherever you go. Bluetooth Microphone:Noise cancelling bluetooth headphones can be connected to different electronic devices. Wireless over the ear headphones built-in microphone