Logitech MK520 2.4 GHz Wireless Keyboard and Laser Soft Rubber Grip Mouse Combo Computer Hardware_Mice which means direct line-of-sight is

which means direct line-of-sight is not required for operation

CM-CAB-BKIT-8KKB-R(Black/Blue)

Item model number: SDCZ48-032G-C46

Flash Memory / Form Factor:Flash Memory

Logitech MK520 2.4 GHz Wireless Keyboard and Laser Soft Rubber Grip Mouse Combo Computer Hardware_Mice which means direct line-of-sight isSleek 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