Uni-Com Sensor Lights automatically switch on when movement is detected. Perfect for bedrooms, hallways, stairs, lofts, cupboards and use all around the house - anywhere you need lighting but do not have a power supply. They have a large detection range and sense movement up to 3 metres away. The lights stay on for 30 seconds and then turn off if no more movement is detected. 5 long life LEDs provide a soft white illumination for reassuring comfort and safety, and the dusk to dawn sensor ensures they only operate when it is dark, saving battery life. They are quick and simple to fit using the adhesive pad or hung from a screw), and are each powered by 3 x AAA batteries (not supplied).