Dell Inspiron 15 5000 Series (5559) keyboard backlit

Hi guys, I bought Dell Inspiron 15 5000 Series (5559) 2 days ago but I just couldn't figure out how to turn on the keyboard backlit since there's no option on mobility center. I was wondering if this unit is in support of backlight keyboard sincr the specifications says so, or just missing a hardware for it? Kindly do help. Im no guru tech when it comes to computers/laptop. Thanks.