Mini USB 18 Keys Numeric Silicone Keypad Keyboard for Notebook Laptop PC 01 Keyboard comes with 18 keys of 0-9 number keys, Del, Enter, BackSpace, Num Lock, + - * / USB interface, plug and play, no driver required Slim, light design, ideal for travel Waterproof , washable and durable Support system : Windows 98/ME/2000/XP/Vista or Mac OS or Liunx