Microsoft Wireless Desktop 850 (PY9-00002) (Band New) with Advanced Encryption Standard (AES) 128-Bit Encryption - Keyboard and Mouse (English) Combo - (Brand New)Microsoft Desktop 850 (PY9 00002) Wireless Keyboard & Mouse Combo [Brand New Retail] The Wireless Keyboard and Mouse 850 Desktop with Advance Encryption Standard (AES) 128 Bit Encryption Enjoy the freedom and convenience of wireless technology. You can move with confidence to almost 4. 5 meters of your computer while maintaining a good wireless connection. You can also carry your mouse and use it with a laptop while on the move; the tiny transmitter