Light instantly turns on when it detects motion within 10ft and at a 120 degree angle. It switches back off when there is no motion detected to save energy. It is perfect to light up your garden or front entrance when you are outside in the dark, you will be able to see where you are going. The solar light is waterproof, heatproof and durable, so it can be left out in all weathers and it will work as long as it has 8 hours of direct sunlight. No batteries, no cables, & easy to install, simply screw the 2 screws included into the wall/fence and it will work.