Blog Prompt: If you could change the world by developing a device using computer science, what would it be and how would it change the world we live in?

i would develop cordless earphones. with these earbuds you could listen to music without the hassle of having a cord. they would be connected by Bluetooth. this would change the world we live in because it would give people less things to complain about and to be able to listen to music easier because you couldnt break them. these earphones would have a tracking device into your phone so you couldnt lose them either