Lots of pictures this post... This is the flight controller board, containing all the wiring for the multitude of sensors and electronics.

Notice the super caps on the underside that allow for in flight ignition of ejection charges.

The serial connection has a simple menu interface that allows for remote arming and firing of the rocket and constant monitoring of telemetry in flight. Arming the rocket requires an arming code, and once entered, the buzzer warns everyone nearby that the launch is eminent.