This is a pretty good gaming mouse. I haven't figured out the last 2 buttons though. One says \"OPI Switch\" and another is \"auto fire\". The auto fire button appears to hold the click after the mouseup action. That makes sense. The OPI button just seems to turn the red light on the side on\/off. I haven't been able to reprogram those, but haven't tried real hard. Truthfully, it is a 5-button mouse... the other two don't do much beyond what I described. Still a good mouse.