Wireless optical mouse features reliable 2.4Ghz technology to provide a strong connection from distances up to 33' away with virtually no delays or dropouts. Energy-efficient design works for up to a year between battery changes for long-lasting performance. Plug-and-play connection eliminates the need to pair the mouse or to download additional software to let you begin using it right away. Its comfortable shape supports your hand to allow hours of enjoyable use. The ambidextrous construction and the ability to reassign right and left button functions make this great for your right or left hand.