FORALL Active Noise Cancelling Headphones, Over Ear Wireless Bluetooth Headphones, Hi-Res Audio, Deep Bass Memory Foam Ear Cups, 40H Playtime for Travel Home Office - Black

Features: Note: 1. It's NOT 100% noise cancellation. Human talking CAN NOT be elimated and ANC is less effective in quiet environments. 2. 40hours of use and comfortable earmuffs ensure long-term wear without pressure. 3. The microphone only works in wireless (Bluetooth) mode.To use this Bluetooth headphones on the computer, it must be in the Bluetooth connection state and change the audio input and output to this Bluetooth headphones in thesettings. 4. Use the audio cable to connect without the microphone function. 5. How to wake up the voice assistant of the headphone:When the headset is turned on and connected to the phone's bluetooth, please double click the power button to wake up the phone's voice assistant.