Works well . But when the dogs dont have the sensor on the ID chip in there neck will open the door . So have to make sure it is also turned off .

I thought this was a coded transmitter, but instead it appears to be operated with a magnetic tag. Radios (speaker magnets) and some metalic items when passed close to sensor will cause door to open. Not the greatest if you have security concerns. I plugged the sensor into a wall switch timer to lock out operation at night. Other than that it works well for the dog.

This works very well and a no-brainer to install.