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The receiver generates new random numbers and by pressing the button selects a number from a large set of numbers that it chooses in a predetermined order.
The codes are chosen in both these parts (transmitter & receiver) always in the same order.
The cycle repeats, with a different code each time.
This is the communication system of transmitter and receiver with rolling codes.
The receiver only activates the opening or closing when it receives a signal with the expected code.
Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.