bluetooth headphones

Hi everyone ! First time posting here. I want to gift my son his first headphones for his birthday. I wanted to pick the sundara (open or closed back) as they are quite cheap for the quality... but my wife says otherwise She's requesting those headphones to be bluetooth and below 130€... Make...

I wanted to draw your attention towards this, as I find it pretty exciting: Wondering what you think about it. Here is a preview of the upcoming Indiegogo campaign: https://www.indiegogo.com/projects/oluvsone/SpX-R There are already some direct comparisons to other popular headphones...