This thing is V2 of the cooler for caps.
It clips itself on any cap edge
Compatible with any standard cap.
Compatible with any 9V battery.
I could find a 1000mAh USB rechargable lithium-ion battery that will allow the fan to run at least 8-10 hours non stop.
Working great in areas with no wind during summer such as non air conditioned trains, sharks etc....
- 2019.06.30 - Original Post
Enjoy hot summer!
3D Modular Systems
Evolutive 3D Printers
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