The debuzzing dimming coil is an option to consider when using a magnetic transformer with a low-voltage magnetic dimmer. Available in a 150 and 300 watt option. The dimmer may cause a buzzing or humming sound from the transformer or the lamps, which may be objectionable in some applications. The dimming coil does not dim the system it functions only to reduce the noise from the transformer or lamps. Dimming coils are available for magnetic remote and surface transformers. Because the remote transformer will most likely be installed in a remote location, it should not need a debuzzing dimming coil. However, for occasions when the remote transformer is installed close to a living area, a dimming coil is available separately. The dimming coil fits inside the transformer housing. ETL listed.