If you point it toward the direction of the car it will signal on or off. i can be inside my house at night and point to the direction of my car through 6 walls and my car will lock, start or unlock. One thing you don't want to do is unlock your car too far away. Too easy for carjacking. When I put my groceries in, I lock til I get back from depositing the cart to the cart corral. When I get back, I unlock and quickly lock again as soon as I get in