be carefull as the 12 volt trigger does not seem to push out 12volt. i have the owl 6 foot auto screen and the 12 volt trigger did not work. an owl engineer came to me and tested my system said that the 12 volt was only giving out 3 volt. he burnt out 3 of his auto boxes because they need a definate 12 volt for screen to work. so he installed a seperate 12 volt unit that powers it perfect so we bypassed the trigger on ae500.