Its hard to pin in down to a specific number of feet. Many factors play a role. The big manufactures like to put a number of feet, we find it generally highly inaccurate because there are to many factors at play.
We have found the range to be similar to the basic Avital remote starter.
This product will not provide extremely long range. When your plane is landing on the runway you wont be able to warm up your car. However our goal is that in the freezing winter, you should be able to start your car from anywhere in your house. Providing your car is not parked to far away.