I don’t know when or how this thing is supposed to work. For me, most of the time it doesn’t. I push the dash switch and get 3 quick beeps which means it’s not going to open the rear hatch. I’ve had it work when the engine is running and in park, then not work under the same condition. I’ve had it work when I’ve stopped the engine but haven’t opened the driver’s door, and then not work under the same conditions. Sometimes it will work if the engine is off and I open the driver’s door, sometimes not. I get the safety thing, but it drives me crazy. What use is it?