Build your professional career with the 19-Key Numeric KeypadAs far as I am concerned， the 10 numbers (0-9) plays an important role in your work， even in your daily life. What kind of professional job are you working on? The USB 19-key Numeric Keyboard for Laptop is perfectly fitted with spreadsheet， accounting and financial applications. It can meet your requirements for numbers input. There is no driver needed， simply plug and play. To pursue the effective use and durability， the mini device is made of high quality silicon gel with super thin key caps. It is ideal for mobile users with laptops， which is washable and dust-proof. The intimate LED indicator is attached. Let the professional keypad master your career.                                    Features            Mini digital keyboard with 19 keysCompact and fit easily into your computer bag， briefcase， etcSolid and durable structurePlug and play and hot swappablePower-on indicator LED lightSupport USB port on any PC or laptopOperating System: Windows ME / 2000 / XP / Vista                                                            Specifications            Condition    NEW    <br>Keyboard Interface    USB    <br>System Requirement    1 USB    <br>Compatibility    Desktop    <br>Design Style    Standard    <br>Operating System    Windows ME / 2000 / XP / Vista    <br>Color    Black    <br>                                                            Package Includes            1 x USB 19 Key Numeric Keypad for Laptop Black                                                            Extra Info            Please have a careful wash for your keyboard as follows: <br>First， shut down the computer and detach the keyboard connector before cleaning the procedure. When the keyboard is connected to the computer via USB， detaching the keyboard while the computer is running is safe. <br>Second， there is a recommended way for a quick cleaning， which is turning the keyboard upside down and using a can of compressed air to blow out all foreign matter， and then tapping on it a few times. You should see a bit of dirt fall out. Change the angle and tap harder to make most of it get out.<br>Third， for a more thorough cleaning， you need to clean the sides of the keys with a cotton swab dipped in isopropyl alcohol. Gently pry up each key with a small screwdriver or a similar lever， when all of the keys have been removed， blow out any debris with compressed air. Carefully swab all surfaces of keyboard with a moist (but not wet) cloth. Besides， any type of fluid to enter the keyboard is not allowed.