Logitech Rx1000 Scroll Tilt Laser Mouse 20X more tracking power due to its High Performance Laser engine Responds to the slightest hand movement with extraordinary accuracy Amazing performance on more surfaces  tracks flawlessly on the high-gloss surfaces that LED-based mice cant negotiate 1000 dpi resolution boosts and exceptional performance Scroll horizontally or vertically, zoom in and out, with Logitechs Tilt Wheel plus Zoom technology