A 50W constant current LED driver for 900mA Collingwood LED products. Fit one RDSL or SQSL recessed LED retail products. The PSDIM900 can be controlled by a 1-10v analogue dimmer if you wish to dim.Link up to ten PSDIM900 to one 1-10v dimmer by using a 1m sync cable provided. An extended sync cable of 4m is also available as a separate product to further extend the distance between each power supply.