According to Mircosoft:“Touch and Type Cover do a lot more than just protect and personalize your Surface RT. By providing a keyboard that goes everywhere with you, they let you get real work done. With Office Home & Student 2013 RT pre-installed - which includes versions of Word, PowerPoint, Excel and OneNote - a Touch Cover or Type Cover is the perfect accessory for your Surface.”This is a limited period offer, so grab the best covers through Microsoft Store or other Surface RT retailers.
You could also choose a wide range of options while choosing. The Surface Touch Cover comes in cyan, red, magenta , white and black & Type Cover available in Black
Touch Cover
Type Cover