Model Rocket Lauch control. I made this for my son to launch rockets. It uses 2, 12v led Momentary switches, 2 waterproof bullet connectors on the back and is wired with a 12v 0.8AH SLA battery and a 5 pin relay. It also has a Voltmeter, key switch and system active led. I have not created a wiring diagram for this system. It is based on many existing launch control wiring diagrams out there..