Get the scent you want with no mess! Step 1: remove from box and set the diffuser on the wooden tray Step 2: add 2-5 drops of any oils you want Step 3: enjoy! You determine the scent and strength. The best part is, once the scent is gone, you can add something completely different. There's no water, no clean-up, and no lingering smells from previous oils. It's lightweight and a gorgeous addition to any room or office!