Philips SHB9850NC/27 Wireless Noise Canceling Headphones, Black Active Shield Pro noise canceling reduces noise by up to 99%. Connectivity Technology: Wireless Bluetooth 4.0 with built-in AAC and aptX codec support Multi-pairing plays music and calls on two devices at once Talk without taking off headphones with Talk Mode Rechargeable battery offers up to 16 hours of wireless music