sony wm ex oneseventytwo         
 i  don't  know  much   about  this   one 
 because i  broke  it instantly.  it's  a 
 walkman   anyway,   runs  off   of   the 
     standard two double a batteries.     
 it has a switch for  normal tape  versus 
 copper  oxide  / metal.  it also  has  a 
 switch for  something called  avls  (can 
 be    set    to    norm    or    limit). 
 it  has mega bass (on or  off) and dolby 
 nr  (on or off) and two band eq (i think 
         thats the dolby thing).          
 it  does  have  a  speed hole  which i 
 found out about by destroying it.  like, 
 thats how i found out about speed holes.