Monoprice 5-Button Optical Laser Gaming Mouse (109258) Laser tracking for improved sensitivity and accuracy Adjustable dpi settings: 800, 1600, 2400, or 3400 dpi. Adjustable mouse weight using a weight tower and five 4-gram weight discs Etched sides for improved grip, rubberized upper surface for comfort No installation or drivers are required. Just plug it in and it works! LED lighting cycles through various colors around the top of the weight tower