This carefully crafted aromatic oil is not compatible with Hotel Collection Studio Pro diffusers. Unique fragrance composition: our black velvet oil aroma is a mixture of therapeutic grade essential oils with notes of blond, rose and black fig woods Long-lasting aroma: Experience the long-lasting embrace of luxury with our aroma diffuser oil, which lasts all day with a constant fragrance per bottle to enhance any room diffuser setup Ecological fragrance oil: this essential oil is paraben-free, vegan, cruelty-free, phthalate-free and made in the United States Versatile luxury: our aromatic oils from the Hotel collection are perfect when you are crafting the aroma of your home, bedroom, office and kitchen; diffuser oils will help make each room feel opulent Essential oil blend: our aromatic oils mix therapeutic grade essential oils and perfume quality aromatic oils.