Top features:- Listen to your music without background noise with NoiseGard noise cancelllation- Wireless Bluetooth technology lets you enjoy your music without the hassle of cables- Integrated microphone lets you answer calls on the move- Foldable headband design for easy storageListen to your music without background noiseEnjoy your music free from background noise thanks to NoiseGard noise cancellation. It filters out ambient noise so you can appreciate every song without interference from whatever’s going on around you.Wireless Bluetooth technologySennheiser HD 4.50BTNC Headphones feature Bluetooth technology, allowing you to enjoy your favourite music wirelessly wherever you go. With aptX for high-quality audio playback, they can be synched quickly and easily to your devices using either Bluetooth or NFC pairing.Offering up to 25 hours of battery life to see you through your weekly commute, you can still use the headphones even when the battery runs out using the optional 1.4 m audio cable.Integrated microphoneAnswer calls while on the move without needing to remove the HD 4.50BTNC. The headphones include an integrated microphone in the earcup, meaning that you can make and receive phone calls using the headphones as a headset.Earcup mounted controls allow you to adjust the volume of your music and skip between tracks.Foldable headbandHD 4.50BTNC Bluetooth Headphones have a foldable design, making them extremely portable as they take up minimal space. This makes storage simple using the included pouch.A micro USB charging cable makes it easy to recharge the battery, with a full charge possible in just three hours.