Tried in vain on my remote portal and garage (though supposedly compatible: 433.92 Mhz) - has nothing to do! When in doubt, tried on other remote members of my family (as in 433.92 MHz): FIASCO!
After reading the other reviews (I'll have to do it before ...) it seems that it is a scam to Chinese.
Too bad that Amazon.com endorse this type of material.