This is because the imt smart autogate can control through the imt Home; imt app, voice command, controller, and switches. Therefore, you don’t need to worry about the controller runs out of battery because you can control it through imt Home. With imt Smart Home, you can control your autogate anytime and everywhere with your smartphone, all you have to do is download imt app; imt Home. Thus, you can still open gate for your friend even you are away.