Bringing headphones to life

I found these broken headphones that work via Bluetooth in a garbage dump near my house since they still retain their color, so I decided to take them knowing that at home I had a way to repair them and make them work
The repair materials you use are
A saw for cutting plastic
Epoxy putty
Disused headband style headphones
Comment with a minimum of 20 words.
this a work of great and inovative mind.
it takes someone with brilliant mind to achieve this.