Enjoy precision and smooth control without the hassle of wires withthe Logitech M235 Wireless Mouse. Advanced optical tracking makesit work on almost all surfaces. It uses 2.4 GHz wireless technologyto offer reliable, high-speed performance. This wireless USB mousecomes with a nano-receiver that is so tiny that you can leave itplugged into your system and remain worry-free of its loss. The compactsize and contoured design with soft grips ergonomically fit yourhand for working comfort. The on/off switch and sleep mode extendthe battery life of this wireless optical mouse, while the indicatorlight lets you know when it requires a battery change.