Inalambrica safe connection Enjoy inalambricant technology at 2.4 GHz that provides a reliable connection with up to 4.6 meters, without any interference. 128-bit advanced encryption standard This keyboard provides advanced encryption standard technology (AES*), which is designed to help protect your information by encrypting your keystrokes. Each keyboard is permanently associated with your receiver in the manufacture, so that key information is never shared in the air. Learn more Windows Quick Access Keys Use quick access keys to use frequently used tools, such as audio and approach controls and calculator. Designed for comfort in both hands Excellent design comfort to fit perfectly to your right or left hand. Microsoft Optical Technology Optical Tracking technology provides highly effective mouse cursor control. Connectable Transceiver Connect the inalambric receiver to your computer's USB port when ready to work. Attach it to the bottom of the mouse when travelling and it will automatically disconnect.