This right here is all dependent on the current wireless router that you have. But, most of them will have a very good range. Here is what you really need to keep in mind, though. Objects can worsen the signal strength if they are in the way. So, ensure that your router is in plain view and not tucked away in a drawer. The same can be said about the sensor so try to keep it in plain sight. As for the distance, granted you do not live in a mansion, it should not be much of an issue (though the closer the better).