This is a protective keyboard cover. Made of silicone, durable for use. It is and not easy to deform. It can protect your keyboard from coffee, water, dust and some other contaminants. It is very convenient and easy to clean and store. Features -Material: Silicone. - Compatibility : Compatible for Dell KB216 wired keyboard, KM636 wireless keyboard, Optiplex 5250 3050 3240 5460 7450 7050 and 3475/3670/3477 all-in-one desktop. Please check your keyboard to avoid incorrect purchase! - Notice: Please compare the laptop’s keyboard layout and model with the product picture to avoid buying an incompatible keyboard!! for any compatibility issues. Note: If the "Enter/Return" key looks like the Arabic "7", then this product is not suitable for your laptop! It works only for the U.S. version, and the "Enter" key is a rectangular. - Best protector: Smooth and comfortable to touch, this ultra-thin keyboard protector is designed to be waterproof and dustproof to protect your laptop keyboard from spills, dust, coffee, tea or wine, and other contaminants. - Practical: Durable and non-toxic. Provide a comfortable feeling when typing. Personalize the keyboard while adding extra protection. - Our service: 60 days replacement warranty. , please us directly and we will try our best to solve them. Package list: 3 x Keyboard Cover