Logitech Logitech MK220 Wireless Keyboard and Mouse

Key Features
Sleek full-size wireless keyboard with softly rounded keys for hour after hour of typing comfort
Contoured
invisible optical mouse that tracks on just about any surface, with
rubber grips and smooth, accurate cursor control (The optical sensor
does not work on glass or mirrors)
Virtually no battery changes
get up to three years of battery life for the keyboard and eighteen
months for the mouse( Keyboard and mouse battery life may vary based on
user and computing conditions)
Powerful 2.4 GHz wireless and one tiny Logitech Unifying receiver give you a reliable connection without delays or dropouts
Works with Windows-based PCs