Aluminium shelf slot bracket 600mm long with an 8mm thick slot to suit an 8mm thick glass shelf. Low voltage LED. lights (0.5 Watts total output) contained in the bracket can be turned on or off by a small switch on the end of the bracket.(switch is on the left hand end of when looking at a front view of the bracket mounted on the wall) LED lights are powered by 4 x AA batteries not included. Batteries are easily replaced by removing endcap on the right hand end of the shelf slot bracket. 800mm length LED slot bracket is also available.