Sony Bluetooth Noise Canceling Stereo Headphones MDR-NWBT20N Black (Japan Import) Noise canceling headphones | can cut up to 98% of ambient noise New model of MDR-NWBT10N Bluetooth Ver. 3.0, Bluetooth profile A2DP/AVRCP Power: Li-ion battery (Built-in) (about 8 hours enable), Power Supplied from PC or Walkman Pairing: Bluetooth pairing or NFC pairing