The larger one also offers active noise compensation. Both models are equipped with paper fibre membranes and can decode Bluetooth signals with the codecs aptX HD and AAC. The main functions of the IO headphones are controlled by three controls: the DALI logo on the right earpiece acts as a multifunction button for play, pause, skip forward/backward, answer call and hang up, and the volume is adjusted by pressing the upper or lower part of the ring surrounding the logo. The battery life of both headphones is up to 60 hours when Bluetooth is activated and up to 30 hours when noise cancelling is on. Optionally, the headphones can also be operated via the included cable. They will be available in black and caramel white in November.