The Logitech Pro 2800 Cordless Desktop is a cordless mouse-and-keyboard solution that offers plug-and-play setup and 128-bit AES encryption - one of the highest levels of data security available - to help protect the information transferred between the keyboard and the receiver. All are at an affordable price. Pre-paired, software-free install saves time. Logitech's advanced 2.4 GHz wireless technology virtually eliminates delays and dropouts. Time-saving hot keys and extra number-pad keys launch your favorite applications - including calculator, e-mail, and Internet browser - and help increase your efficiency (no software required). And the contoured, 8-button mouse with hyper-fast scrolling provides exceptional comfort and high performance, letting you scroll through 10,000 spreadsheet lines in 7 seconds.