Backdraft Airsoft show their Backdraft Catalyst Wireless Edition in this video to show you how it works... "The Backdraft Catalyst Wireless Edition is here, packed with advanced features and a mobile app available for both iOS and Android. This innovative controller allows you to manage all your FCU settings and even accessories like box mags and tracer units, bringing a new level of control to your airsoft gun. 

Backdraft Airsoft says that the Backdraft Catalyst FCU is the cheapest FCU in the market... "The backdraft catalyst is the cheapest and smallest FCU on the market, sports 5 different fire modes, is easily adjusted with 2 potentiometers, and is compatible with any single solenoid airsoft HPA engine on the market!