Item specificsDPI:1600Interface Type:USBPackage:YesApplication:Desktop，LaptopNumber of Buttons:3Tracking Method:OpticalType:WiredStyle:3D，Mini，FingerHand Orientation:Both HandsOptical Resolution:1600 DPINumber of Rollers:1Model Number:OM-669Model:ElephantProduct:Boy(White) / Girl(Black)Cable Length:1.2mDescription:High Quality and Compact DesignEasy installation: Plug and Play.Optical technology works on most surfaces.Most suitable for Laptop and PC users.Comfortable touch feeling，mobile and stability.Ergonomic designCable length: 1.2mCompatible with Windows XP/Vista/windows7 Operating systemPackage Includes:1x Wired Elephant Mouse