The BT 6.0 headphones with advanced Hybrid Active Noise Cancelling (Hybrid ANC) are designed to let you lose yourself in your music. By combining feedforward ANC (external microphone) and feedback ANC (internal microphone), noise is detected before it reaches the ear and is also measured and corrected inside the ear canal. This results in more effective and precise reduction of ambient noise, such as airplane or train noise. Enjoy your favorite songs with amazing sound quality for up to 40 hours on a single charge, without being distracted by annoying noises. The BT0081 offers comfortable, adjustable head cushions to ensure comfort over long periods of time – for hours of music enjoyment. Also practical: the headphones are quick and easy to fold up and come with a protective case for when you're on the go.