This isn’t like a sealed traditional vent air freshener. It’s open to air on both sides. So, if you’re new to essential oils, just expect to add a few drops every 1-2 days if you want a heavier smell.

I already use various essential oils at home so this is perfect! Love the beautiful designs and quality. Diffuser face is metal and has a snap closure with sturdy clip. Felt pads are thicker than expected and fit perfectly in the diffuser.