The instructions are on the back of the box, and the function is very simple: one function button is all that is needed to make the headphones work. It is surprisingly sturdy, and my aluminum foil finally has a home. They were all correct, and I have no hesitation in joining the rest of the reviewers in recommending this one. White powdery chemical substance oozing out of battery inside the unopened box. It has great battery life and is very durable (It fell off of the top of my fridge and it still works awesome). The lack of actual buttons is the culprit. I didn?t have high hopes for these shoes because I thought ok sketchers? Meh. I got them in red and look forward to pairing them with sundresses, shorts and pants. Very roomy, easily attached to roof of car, clear instructions. shoes are narrow and cheap lookingwish I could return it but I took with me on my vacation and just left it in the hotel room maybe someone else will like it