LOGITECH 920-002836 WIRELESS DESKTOP MK320 (US) Youll get a 2.4 GHz wireless connection with up to a 10-meter range, even in the most crowded wireless environments, plus 128-bit AES encryption for the keyboard. The sculpted wireless mouse is designed to be both comfortable and easy to take withyou, so you can use it mouse with your setup at home, or when you want to move around with your notebook. Just snap the receiver on the mouse and go. Youll enjoy less hassle and go for months without changing batteries up to 15 for the keyboard* and up to five for the mouse.** The instant-access hot keys make it easy to watch videos, listen to music, or launch applications including your calculator, e-mail program, media player, and more all without installing software. The full-size keyboard with low-profile keys and integrated number pad helps you type and work more comfortably without feeling cramped.