The magic behind the ease of using a remote-controlled garage door lies in its opener. The typical mechanism involves two main parts: the electric motor and the chain drive. When activated by a signal from your remote control or wall switch button, electricity runs through the motor which spins gears that move the chain—an operation similar to how bicycle chains work.This simple yet ingenious design makes our lives so much easier but like all mechanical devices they are prone to wear and tear over time - leading us towards repairs at some point down line.