Essential oils:

Bergamot , Petitgrain , Peppermint , Litsea(May Chang) …

Function : Improve thinking and work efficiency, increase concentration, suitable for office work, yoga, driving , doing homework or work etc...

7ml of 100% pure essential oil, blended with differents kinds of essential oils, let the wood absorb a bit of the essential oils and will make the room smells much nice, theres no need for fire or electronics, absolutely safe .