I think you are supposed to wrap it around your bar and get it tight, then slide it over the throttle. It will give you amazing power at all times.
But seriously, i cant believe you bought that. If you look on KaleCoAutos site youll see that its not real. Unless you think that you have to change your blinker fluid. You probably couldve done a goggle search, or just listened to the people on here and still have your 40 bucks. And if a powerband was real and added power, dont you think there would be people using them?