These headphones can be used both wired and wirelessly and use active noise cancelling to eliminate low-frequency noise such as the sounds of car and airplane engines. When using noise canceling, music can be played for up to 40 hours, and up to 60 hours under normal conditions, and 5 minutes of charging allows for approximately 4 hours of music playback. Since it can be connected to two devices at the same time, you can smoothly switch between listening to music on your smartphone and web conferences on your PC. You can also play high-resolution audio sources by using an AUX cable.