Please read .Do you need batteries to listen to sony noise canceling MDR-NC40 headphones?

I just bought these f***ing headphones for 104 f***ing dollars and I think you need batteries to use them!!! If you only need them for the microphone th ats give but if I can't use them without batteries I'm going to be p*ssed. Sorry I'm just mad! If you aren't sure can you look into it for me cause I am going this on my phone and its hard to look stuff up.