I don't understand how that works. It was my understanding that the magnet "woke up" the sensor so that you could talk to it, as the sensor is supposed to have a built-in "on-off" switch that operated when the tire rotated, so the sensor was 'off' when the car was not moving, saving the battery. Since you can talk to the sensor at any time, what I understood to be the way it works is not accurate.