The Evolution is a resistance activated release and is the perfect release for teaching proper shot execution. The release will fire when you increase the resistance.To fire the release hold the safety down as you pull back. Then once you get into your valley and anchor in, let your thumb off the safety and begin pulling and building pressure on the back wall of the cam until the release fires. This is a perfect concept for struggling archers; learning to do nothing but push and pull until the shot fires. Evolve into the best shooter you can be with the new Evolution.