ET Blue 4 button dual code remote transmitter used on ET products such as new and old ET Dc Blue and ET Advanced garage motors and ET gate motors and receivers. ET no longer manufactures the larger dark blue remote with “Plus” on the back. This remote has dual coding option as a result it can be programmed into new and old ET products. To select the old or new code is easily done by holding down the remote button for longer than 20 seconds. This remote is small and compact but still offers great range, normally 100m. Frequency - 433.92mHz