MCSaite USB Numeric Keypad - 19 Keys Mini Number Pad Portable Slim for Laptop Desktop Computer PC

Product Specifications: Keyboard comes with 19 keys of 00,0-9 number keys, Del, Enter, Num Lock, Backspace, + - * / Material: ABS Plastic Color: Black Range:10m Size:124x82x18mm Package list: 1 * Wired Numeric Keypad1 * User manual (English and Chinese) Warm prompt: One Year Warranty. Any question during use, please feel free to contact us.NOTE: This numeric keypad for laptop may not be fully compatible with Mac system. (Function keys do not work, while numeric part works fine.)The number key 0-9,* - + . / is switched by F11(Num Lock).When you open Numlock the number is work and the first indicator will light up.In this monment the function button????? and so on?is failure.?