Optical - wireless - Radio frequency - Blue - USB 2.0 - 1000 dpi - computer, notebook - scroll wheel - symmetrical Radio frequency wireless connectivity helps reduce the clutter of wires 1000 DPI optical LED for smoother movement and hassle-free performance The symmetrical shape lets left as well as right handers use mouse with ease Strong, consistent wireless connection from distances up to 10-meters (33-feet) away. Note: In case of Wireless mouse, the USB receiver will be provided inside or along with the mouse