We suggest the smart doorbell to be mounted as close to your Wi-Fi hub as possible but we understand that it may not always be possible. The exact distance is difficult to tell as various factors come into play, you can test the range by placing your smartphone where you would like your doorbell and then running a speed test to see the results. If the Wi-Fi signal is weak or speeds are to slow in this area than a better router or Wi-Fi extender may be required.