This window picture comes with an electric illumination system which very is modern and user-friendly. The light comes from durable LEDs. Safety extra-low voltage provides a maximum degree of safety. To connect the cable to a power source, you can choose between different options: either with the USB plug or with the wall plug transformer which is included in delivery. It is also possible to use batteries, when you connect the usb plug to a battery box. The battery box is not included in delivery, but can be purchased separately.