Jango Head Piece

Anyone Know how, where or what Jango has on his head here, ive searched but to be honest i dont really know what im searching for or what indeed its called

many thanks

Is his Slave one internal comunicator, I saw some post from Seeker building one ....................

Seeker again .............. right ok il pass for a while and have a look else where for now, maybe even have a go at building one it doesnt look to hard