The F1-Max Car Aroma Diffuser has an eye-catching retro design which makes it the most beautiful aroma diffuser on the market. Works with solid perfume that is extracted from natural plant, the fragrance can last for 15-20 days. Besides default scent, you can add your favorite essential oil. As the images show, you can place it at desktop, in office or in spa room. Actually it works better in a car, it can generate negative ion that helps remove the odor smell in your vehicle. In addition to a fragrance diffuser, it is also a runnable toy for little ones. Yes it runs on floor. I think it is the best gift for women.