- Bluetooth: Yes, to answer you need to press the multifunction button. To hang up, press the multifunction button again. You can also reject a call with your headphones by pressing and holding the multifunction button for 2 seconds. Clear Voice Capture technology uses two microphones that are dedicated to calls to ensure clear conversation. - In USB DAC: Yes, if the device supports standard USB protocol. - In Jack: No, it’s not possible in jack mode as the microphones are not activated.