What Is the Brown, Gum-Like Material in the Center of SwitchBot Circulator Fan Blade?

• Related Product: SwitchBot Circulator Fan, Related Product: SwitchBot Battery Circulator Fan

The brown material is a balancing adhesive applied to help maintain the stability of the fan blade during operation. It is part of the product design and does not need to be removed. Please feel free to use the product as normal.