This transistor radio is just so sexy looking! You can just imagine somebody walking around with this from the 1950s with hair slicked back, jeans rolled up and hanging out on the hood of a car with wing sides! This is marked transistor and then Electro and the back appears to be made of bakelite or another heavier plastic. I don't want to force the back to open it and it looks like the button that you push into maybe opens. It has been pushed in although I can't tell if it was supposed to be like that or not. But in any case I'm not opening it and we'll leave that up to you. It is being sold as is and really for decorative purposes. More than anything else. Would look awesome on display!