32mm neodymium speaker drivers deliver precision soundnFinely tuned 32 mm neodymium drivers combined with a closed-back acoustic system design and on-ear sealing provide an excellent and impressive precision sound.nnBluetooth 4.0 with built-in AACnEnjoy high-quality wireless sound with Bluetooth 4.0 in combination with built-in AAC.nnMulti-pairing plays music and calls on two devices at oncenMulti-pairing allows you to connect your Philips Bluetooth headphones with two Bluetooth-enabled devices simultaneously. Simply pair up the two devices to enjoy movies and music while effortlessly taking calls in between.nnSimple NFC one-tap pairingnSimple NFC pairing lets you connect your Bluetooth® headphones with any Bluetooth-enabled device – with just a single touch.nnControl calls, music, volume and more with earshell switchesnSmart controls on the right earshell enable you to control music and calls with a tap.nnActiveShield™ noise cancelling reduces noise by up to 97%nActiveShield™ active noise-cancelling technology features two feed-backward microphones used for cancelling low frequencies. It detects ambient noise and inverts the sound wave, effectively cancelling it out and converting background noise to silence.nnCompact folding for easy carrying and storagenThe compact, foldable design makes it the perfect on-the-go companion.nnExtra audio cable means music can continue without powernUnlike most noise-cancelling headphones, the headphones work with or without battery to consistently deliver excellent audio in any environment. If the battery runs out, simply plug in the audio cable and continue enjoying your favourite music.nnRechargeable battery offers up to 16 hours of wireless musicnEnjoy 16 hours of continuous music playback even with Bluetooth and active noise-cancelling on, 28 hours when only Bluetooth is on and 33 hours when only ANC is on.nnActivate Siri and Google Now with a press-on earcan buttonnCompatible with Siri and Google Now, the latest Philips Bluetooth headphones make using your virtual assistant even easier. All you need is a press on the earcan button to activate Siri on iPhone or Google Now on Android devices.nnEco passport - Our environmental product specifications overviewnPhilips cares about the environment and society at large, and strongly supports eco-design of products.