40 Watt SWITCHLD 12VDC All In One Wall Dimmer and DriverThe GM Lighting 40 Watt SWITCHLD 12VDC All In One Wall Dimmer and Driver (Part # SWD 40W 12VDC DIM) is a sleek, single gang solution that integrates a constant voltage power supply and dimmer switch into one compact unit, eliminating the compatibility issues that arise when pairing separate drivers and dimmers. Designed to fit standard single gang electrical boxes, it delivers smooth 100% to 10% dimming for constant voltage LED fixtures and features