Sony order walkman wm-ex3 (with ex5 glass door)

Product Name: Sony order walkman wm-ex3 (with ex5 glass door)
It's a wm-ex3 model with wm-ex5 outfit (glass door with mirror finish ), sounds pretty and works flawlessly Anyway , its the early high order end slim version, currently it installed with a low quality belt and still performing, believe you can enhance the sound quality a bit by using a better belt What's included : wm-ex3 body with glass door only What's not working : except the fact that it's using a wm-ex5 front lid (glass door) , nothing else is wrong, it play both sides well, all functions checked.