JeffTron application turns your smartphone into controllable fire control unit for your airsoft gun. Thanks to this app you can easily set up your gun in real time. App works in wireless mode with Leviathan hardware from the Jefftron Company, for all functions you have to buy Leviathan unit. By this app you can also upgrade your Leviathan unit for free with updates which we release in the future. Features: - hybrid fire modes - binary trigger mode - pre-cocking function for instant shot on SEMI