These wickless wax pieces melt quickly to produce room-filling fragrance in minutes. It works in all electric and non-electric warmers. I use about 80% soy wax which makes a well-made soy tart and will quickly, much to everyone’s delight, fragrance the whole room. While the performance and beauty of soy speak for themselves, they are also eco-friendly, renewable, American grown, sustainable, carbon neutral and the list goes on and on. I also use 20% paraffin wax. Paraffin Wax is an odorless wax that sustain color and fragrance very well. With my wax tarts you are getting the best of both worlds. Remember to change your wax after 4-6 hours of use. Some fragrances will last longer than others; I can’t give you an exact timing. The size, shape, and color of individual wax pieces may vary. I like to experiment with different molds and change up colors occasional. Package may also vary. I am still experimenting with packaging, so I have at least two styles floating around. I will try to update pictures to what is most abundant variety available, but that is not always feasible. If you are looking for additional ways to scent your home or office check out my other products: wax tarts, candles, incense sticks, diffuse potpourri oil, and perfume.