Compact, foldable design : Flat and foldable, easily slip them into your bag. Plus, you can take them anywhere, thanks to a compact carrying case. Active Noise Cancellation: Whether you’re listening to a book on your commute, catching some sleep on the plane or taking a call in a noisy café, you’ll hear only what you want. Long-lasting battery: Get 15 hours of playback with both Bluetooth and Active Noise Cancellation turned on and up to 30 hours of playback with just ANC turned on AKG signature sound : AKG has devoted decades to delivering a sound experience that ignites creative expression. Balance gives you smooth, multidimensional tones rather than overpowering bass. Designed for convenient transport and storage thanks to the 3D folding mechanism and the carrying case, you can get up and go with your music at the drop of a high hat