Complex sentence: A typical remote control duplicator/self-learning copy remote is operating at 433.92MHz/315MHz frequency, which is commonly used by garage door opener manufacturers, however the frequency band 44MHz to 432MHz cannot be used in the EU.
Split into simpler sentences: A typical remote control duplicator/self-learning copy remote is operating at 433.92MHz/315MHz frequency, which is commonly used by garage door opener manufacturers. But please note that the frequency band 44MHz to 432MHz can't be used in the EU.