Logitech LX3 Optical Mouse Blue--Special Edition Soft comfort grip; unique, soft-touch sides and a natural, contoured shape 1000dpi precision technology is 2.5 times more responsive than standard optical mice Tilt Wheel plus Zoom is perfect for viewing digital photos and spreadsheets Plug-and-play convenience; just connect the mouse to your USB or PS/2 port to get started Logitech LX3 Optical Mouse Special Edition in Blue