Perixx MX-2000 IIR, Programmable Gaming Laser Mouse - Red - 8 Programmable Button - Weight Tuning Cartridge - Avago 5600DPI ADNS-9500 Laser Sensor 8 Button Laser Gaming Mouse 100-5600 dpi Resolution with dpi Switch 150ips & 30G Surface Tracking Speed Ergonomic Design with Soft-touch Rubber Black Painting 8 Independently Programmable Buttons