QuietComfortÂ® 35 Wireless Headphones II Black. QuietComfortÂ® 35 wireless headphones II (QC35) are engineered with world-class noise cancellation. And now theyâ??re even better. With your Google Assistant built in, you can control music, send & receive texts, and get answers using just your voice. Be free from wires by connecting to your devices with BluetoothÂ® and NFC pairing, and enjoy up to 20 hours of wireless listening per charge.