Choose how much of the world you let in or out ; hear outstanding quality music, have clearer conversation or absolute peace and quiet ; all at the touch of a button. Cutting-edge design meets beautiful simplicity in a choice of three different colours to suit every style and music. Use the Hush function to dim your music and tune in to the outside world, without removing your headphones. Immerse yourself in the deepest, fullest sound anyway, anywhere. Adjust your anc level to fit your every application and use, at the touch of a button. You control your environment and listening experience. Bt+1 - wireless daisy chaining connect wirelessly to a second hp1 and enjoy the music together with a friend. Protein leather ear pieces. Adjustable headband. 40mm driver. Carry case. Batteries required 1 x Li-Ion battery (included) .