Sometimes I'm amazed by it. So far I've been able to activate it from my livingroom which is one wooden wall above ground to the underground parking one steel door and concrete wall forty feet away. I have also gone through three steel doors and concrete walls in the underground parking. Another time from a building through a window to a parking lot about a block away. Sometimes it freaks people out because they are walking by and the horn honks with no one around. Compared to my wife's Jetta whose remote sucks it's amazing.