Dell Pro Wireless Keyboard and Mouse – KM5221W. Combining a discreetly powerful keyboard with an expertly designed mouse, the Dell Pro Wireless Keyboard and Mouse combo enhances your productivity. Powered by one of the industry's leading battery lives of up to 36 months, this combo is built to last. 2.4GHz connectivity. With 12 programmable keys and 1 programmable scroll wheel click, you can gain quick access to your frequently used applications, folders and functions. The full-sized wireless keyboard comes with a dedicated numeric pad, function keys, and programmed pre-sets that can enhance your efficiency.