I've been using a Towtal A-Frame with a RVi2 Electronic braking system for a few years now.
This is how to set it all up.
A-frames and their use tend to attract a lot of controversy so the disclaimer to this user's guide is that it is up to the individual user to satisfy themselves regarding safety and legal aspects 
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Simply tap the 
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then select 
( Add to Home screen ).
Follow the prompts to add our app icon to your home screen for quick and easy access.
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