Product review (2 stars): Put essential oil on sponge pad, sponge goes inside ...
Put essential oil on sponge pad, sponge goes inside "diffuser", put dome lid on (for looks), turn on- mini fan under sponge blows to spread smell of essential oil thru room

It is portable due to batteries which is a positive atribute.

Not enough sponge pads/ unable to clean to remove traces of previously used oils.

Same result can be achieved with any fan, sponge, popsicle stick, and tape.