Logitech Advanced 2.4 GHz wireless connectivity with 10-meter range* Delivers a fast reliable and secure connection using 128-bit AES keyboard encryption with virtually no delays or dropoutseven in the busiest wireless environmentsfor convenient use anywhere in the office including a conference room environment. Wireless range may vary due to environmental and computing conditions. Carry-around mouse With built-in storage for the receiver the mouse is always ready for use in any work environment. 24-month keyboard and 12-month mouse battery life* plus auto-sleep Offers long-lasting battery life to minimize downtime and the cost and hassle of changing batteries. Auto-sleep and on/off switches reduce power consumption to further extend battery life. Keyboard battery life calculation based on an estimated two million keystrokes/year in an office environment. User experience may vary. Mouse battery life may vary based on user and computing conditions. Logitech Advanced 2.4 GHz wireless connectivity with 10-meter range Delivers a fast reliable and secure connection using 128-bit AES keyboard encryption with virtually no delays or dropoutseven in the busiest wireless environmentsfor convenient use anywhere in the office including a conference room environment. Logitech receiver and internal storage compartment in mouse The small receiver stays plugged into the laptops USB port for easy convenient and clutter-free connectivity and can be stored in your mouse to reduce the risk of damage or loss. Users can add up to six devices to one USB port. 24-month keyboard and 12-month mouse battery life* plus auto-sleep Offers long-lasting battery life to minimize downtime and the cost and hassle of changing batteries. Auto-sleep and on/off switches reduce power consumption to further extend battery life. Keyboard Short-cuts Save time with eight keyboard hot keys which provide instant access to most-used applications like email Internet and volume up/down.