AULA SOUL KILLer 2000 DPI 7 Buttons Wired Optical Multimedia Gaming Mouse (Black) Ergonomic Design: Internally and externally, provides comfort and reduces muscle strain during long hours of playing. Adjustable DPI: 4-gear Adjustable DPI(800/1200/1600/2000with flash light. Free double-click firepower key: Gamer-friendly one click fire button to improve gaming efficiency, advanced optical engine provides precision and accuracy. Free dual-mode switchable system: Gaming mode and multimedia mode, at media mode with blue light at roller wheel side, at DPI mode with blue light at roller wheel side lasting for 3-5 seconds. Easy to operate: 1000Hz polling rate, Non-slip rubber coating finish, Gold-plated USBconnector with reliable connectivity.