One button for garage door opener (GDO), the second channel for another device such as gate opener or second GDO (390MHZ each channel) 9-position trinary DIP switches with 19,683 codes per channel Red LED indicates battery strength and signals sent transmission 12V battery and directional visor clip included DIP switch coded for compatibility with all 390MHz Raynor Gate Operators and Radio Controls, excluding Security+ products
