Aluminium shelf slot bracket 800mm long (note shot here features the 600mm long bracket) with an 8mm thick slot to suit an 8mm thick glass shelf. Low voltage LED. lights contained in the bracket can be turned on or off by a small switch on the end of the bracket. LED lights are powered by 4 AA batteries not included. Batteries are easily replaced by removing endcap on the end of the shelf slot bracket.600mm length LED slot is also available.