Our LED transformers (aka DC converters) are used to convert line-voltage (120VAC-240VAC) to stable voltage-regulated 12VDC or 24VDC, which is required to safely run most of our low voltage LED products. They are compact, lightweight and economical. They feature internal resettable short circuit protection. Thermal protection and overload regulation. They cannot be dimmed with an AC dimmer on the primary side. Nor will they work with low voltage AC dimmers (on the secondary side). However, they are compatible with most DC dimmers (including our PWM LED Dimmer, Intervolt, Lighttop, and IML Rotary dimmers). May be installed up to 30' from last light in circuit.