You can use this color changing diffuser to fill your home with a sweet fragrance. Simply add your choice of essential oil into it and let the magic take over. Details: Yellow with wood-like finish3.86" x 2.83" (9.804cm x 7.188cm) Includes 3 pieces For use with essential oils (not included) LED bulbs not replaceable Features 4 timer settings Contents: Diffuser base Diffuser cover USB cable