Set of 2 universal remote controls for garage doors and gates, 433.9 MHz with four channels - Ideal replacement for 543413 (mm)

Note 1: This model can only replace 433 MHz frequency remote controls; it is not compatible with rolling codes or transmitters that emit billions of signals. Please check the operating frequency of your old remote control before purchasing. Note 2: The gate remote control only works with the compatible chip type indicated in the listing description. Please verify that your original chip is compatible before purchasing. The four buttons ABCD allow for use with four types of chips, so the remote control can operate four different types of devices. It only operates on the 433 MHz frequency, with a transmission distance of 50 to 100 meters (in open space), providing you with a new remote control experience that is very convenient for everyday use. It offers high-precision and high-efficiency copying of your existing remote controls, ideal in case of loss.