No headphones or anything just 2 lenses which curve the smartphone display , you can buy a VR box,I got mine for around 200rs locally.
There is almost no difference between cheap VR headsets .
They are tbh gimmicks and nothing else,
I had a Oculus rift,used for less then 2 hours.
The FOV is pretty narrow and don't expect anything immersive, also a 5.5inch display is required for best fov,on a i6 it will look even worse .