External switch
To facilitate the start or stop of the flight in models with a closed fuselage, an external switch is included that can be connected to the Timer as an option on the pin marked BTN.

The switch is quite simple to use: press and hold to start flying, and press and hold to make an emergency stop. You must hold the button down for at least 2 seconds to prevent accidental starts.
The switch has a nut that allows it to be mounted on models with a enclosed fuselage.
Turning the external switch on or off during flight time may cause unexpected behavior in rare cases.
Do not connect the external switch to the ESC pin marked THR under any circumstances. Doing so may cause serious damage to the timer.
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