You can use the Tech Lighting FreeJack 4" Round Flush Canopy to mount a compatible lighting fixture to the ceiling of your home. It can be conveniently mounted to a standard 4'' square junction box with a plaster ring. The 4" round flush canopy of the FreeJack 4" Round Flush Canopy from Tech Lighting comes with a MonoPoint hardware and one FreeJack port for a ceiling or wall. It has an integral round transformer embedded in it. This round flush canopy is ETL certification and is available in various finishes, letting you choose the one that is best suited to blend in with your home's interiors.