The ET Blue 4-Button Dual Code Remote Transmitter works with ET products. It is compatible with new and old ET DC Blue, 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 a dual coding option. It can program into new and old ET products. To select the old or new code, hold down the remote button for over 20 seconds. The compact and small remote offers a great range, normally 100 meters. The frequency operates at 433.92 MHz, ensuring reliable communication.