The EcoGecko Green Leaf is a powerful workhorse for neutralizing unpleasant odors in your space. This listing includes 30ml Orange Oil and 30ml Cinnamon Oil. Simply fill the bowl with tap water, add a few drops of the included aroma oil and turn on the freshness. The unit has a fan system that sucks the air from the room into the water. The air is pushed through the aroma oil scented water, particles are trapped in the water and pleasantly scented air is released back into your room. The shimmering blue LED light emitted into the water and the whirlpool of swirling water will turn any indoor space into a zen like atmosphere. The gently swishing water creates soothing white noise for a peaceful and restful environment.