Now one of our most popular keyboards comes bundled with an optical 2 button scroll mouse. The E03601U1M, USB keyboard, which features the large L shape Enter key and Windows application keys. Along with the keyboard comes a color matching optical 2 button USB scroll mouse which is easy to use and great for the internet and software packages. Bundling these 2 products into one convenient package and youve got a great combination.E03601U1M and E03601U2M products meet the European Union RoHS initiatives.