Gaming optical 16000 dpi black right-hand usb type-a scroll type: wheel buttons quantity: 15 power source: cable 2 m next-gen layoutwe designed the buttons on the rival 500 to resemble the natural motion of your thumb. All the buttons you use are easily clickable by simply rotating your thumb around in a circular motion.Flickdown switcheswith a simple flick of the thumb, the two lower buttons are pressed. We wanted to give you the fastest response time for those key bindings, and the best way was to make it as natural as possible.No number grid say goodbye to the antiquated 12-button grid layout that's oddly reminiscent of your 2002 era candy bar cell phone. This new layout makes it easier and faster to identify the individual buttons with less misclicks.What triggers you no two alerts are the same you choose which in-game events automatically trigger a tactile alert, and you have complete control over how each one feels. Health, ammo, mana, disables, headshots, and stuns can all be individually set to trigger a tactile alert. For example, the moment you get stunned you can set an alert to start, and stop the instant the stun ends.Completely customizablecustomize the vibration patterns, duration, triggers and more. Set an alert that feels like a heartbeat when you are low on hp, or set an alert to do a quick buzz to congratulate you on every last hit. Choose between a wide array of patterns such as: short and long buzz, fast and slow heartbeats, sad trombone, double click...