COMPATIBLE WITHPlease check your device model carefully to avoid a wrong purchase Perfectly compatible with logitech mk545/logitech mk540 advanced wireless keyboard. FULL PROTECTIONEach key & symbol are individually molded and specially printed on silicone for a long lasting professional look, perfectly fit for each keys with all-around protection. WATERPROOF & DUST-PROOFWaterproof and dust-proof and abrasion resistance, protect your keyboard from accidental water spills(coffee/beer/milk), dust, dirty fingers and other contaminants. SOFT AND COMFORTABLE HAND FEELMade of premium grade elastic transparent silicone,Ultra thin to 0.3mm skin cover constructed from soft, smooth, made it easier for typing. FLEXIBLE, REUSABLE AND WASHABLECan be washable for many times, easy to apply and remove for cleaning or disinfecting. If there is any concern or issues, please feel free to contact us.