The fan gives you coolness on a hot summer day. The heater inside provides you with a warm breeze in those cold winter months. This fan/heater comes with a ambient led indicator: cold=blue, warm=purple. The fan speed and the amount of warmth can be fine-tuned.
As an extra it is suitable for extracting harmful solder fumes. Replace those bulky desk fans with this smaller more convenient fan.
The total cost of the desk fan/heater = 7 dollar. The only part I bought was the PWM dimmer, all the other parts were laying around in my garage.