Laptop replacement Backlit keyboard compatible with Dell Alienware M11x R2 R3 US layout black

Full Details from Amazon.com : http://www.amazon.com/gp/product/B00L8IFJMM?tag=onigi-20

Laptop replacement Backlit keyboard compatible with Dell Alienware M11x R2 R3 US layout black

Layout US and backlit
Color black
1 year warranty
Pls confirm your laptop s PN
If your laptop mainboard doesnt support backlit function the keyboard will work normally except the backlit