If you're building a multirotor at home, the electronic speed controller is one of the most important components in the build. This 30A SimonK-firmware ESC is popular with drone hobbyists for its fast throttle response https://brushless-esc-online-ind096188.losblogos.com/40758003/30a-simonk-brushless-esc-a-practical-guide-for-indian-drone-builders