The Logitech Cordless 2.4 GHz Optical Mouse for Notebooks combines a durable, best-selling design with 2.4GHz technology to deliver desktop productivity on the go. The enterprise-class 2.4 GHz mini-receiver provides a reliable 9 metre range and virtually interference-free operation around other cordless mice, Wi-Fi networks, and Bluetooth devices. A new optical sensor emits invisible light providing precise tracking and more than double the battery life of common notebook mice - over four months on two AAs. Plug and play - no software is required. Rugged, comfortable design and a useful carrying case complete a reliable, elegant tool for the demanding mobile professional. USB.