Developed by Kygo, the A4/300 headphones use aptX Bluetooth 4.2 to ensure seamless connectivity while delivering crystal clear sound at all times With up-to 16 hours playback from a single 3 hour charge, you can enjoy listening to your favourite tunes all day long Weighing at just 210g, you can fold the headphones and carry them anywhere easily and conveniently with the carry case provided Memory foam ear cushions ensure maximum comfort, perfect for extended periods of escaping into your music With a microphone and remote control incorporated, you can quickly and easily make and take calls while on the move