The ECO Wedge Pro's battery is charged by day giving it the power it needs to work after dark. After dark the ECO Wedge Pro's motion sensor starts detecting movement illuminating every time it's detected. The following morning the ECO Wedge Pro turns off automatically and begins charging again. The ECO Wedge Pro is designed to be fully automatic however and will illuminate for 30 seconds each time it detects motion making it ideal for lighting doorways, entrances and pathways should you wish to you can turn it off completely using the power button on the front of the unit. Because the Eco Wedge Pro Solar Security Light is completely self-contained with no separate solar panel it features a simple installation process. With only two screws to be fixed in place it's quick and easy to install however with no DIY skills required. Please note that the ECO Wedge Pro must be installed outside in an unshaded location to work to its full potential. The ECO Wedge Pro is designed to withstand all the elements and within reason can be installed in exposed locations.