Suitable for control of dimmable electronic transformers, toroidal transformers and tungsten lamps WITHOUT de-rating. Not suitable for use with fluorescent lamps. Leading edge phase control. For use with resistive and inductive loads. Integrated over-temperature protection fuse. Module case ultrasonically sealed to reduce dimmer buzzing. Smooth dimming operation from 0-100% light output. Fits a plaster depth (16mm) mounting box AU-DSP401. Use a 25mm deep(minimum) mounting box for AU-DSP402, 35mm for AU-DSP651/801 & 45mm for AU-DSP1001. One or two way switching. Complies with the latest Electrical Safety standard for dimmer switches EN 60669-2-1:2000. EMC compliance - EN 55015. 1 Year guarantee. This product available in white finish only.