PRODUCT GRADING Excellent (Grade B) - Will have very light scratches and light signs of use > Refurbished to the highest standards. Original Retail Box WHAT IS IN THE BOX Microsoft Wireless Desktop 850 Keyboard and Mouse - Black PRODUCT DESCRIPTION Enjoy the 2.4 GHz wireless technology which delivers a reliable connection with up to a 15-foot range Advanced Encryption Standard (AES) 128-bit encryption Quickly access frequently used tools, like the calculator, zoom and audio controls by using shortcut keys High-level comfort that\'s designed to fit your right or left hand Precise optical tracking technology provides quickly responsive cursor control Snap-in transceiver stows conveniently in the bottom of the mouse