1.Precise adaptation, no extra operations required. 2.This product are tested before shipping. 3.Please make sure you are buying from keyboardmall. 4. Special skill and techniques required for proper installation. 5.Easy for you replace your faulty,cracked or broken one ,seller remind that you should replace this in the off state. 6.Please remove your current fan from your laptop and compare it with the picture contained within the listing.