A hand-held fan

An electric fan

Pedestal fan

Fans are a device used for cooling themselves down when they feel hot, especially:

1. A machine using an electric motor to rotate vanes in order to move air for cooling.
2. A tool whose shape is usually long triangle or semicircle is made of feathers, leaves, paper, cloth, etc. people usually wave it lightly in a hand to create a cooling current of air.