<https://vilros.com/products/argon-fan-hat-for-raspberry-pi-4-and-raspberry-pi-3-40mm-raspberry-pi-fan-with-power-button-pwm-and-software-controllable#Product>
<http://schema.org/description>
"\nA raspberry pi cooling fan that prevents overheating on the Raspberry Pi 3 B and Raspberry Pi 4.\nComes with a power button that can be used to do safe shutdowns and reboots to the Pi.\nPWM Controllable and Software controllable fan for full functionality and customizability\nUsable in multiple projects, especially for Raspberry Pi Servers where Raspberry Pis are stacked.\nWorks best with other products like the Argon NEO and Argon POLY+.\n\n\n\n\n\n\nArgon Fan HAT for Raspberry Pi 4, and Raspberry Pi 3\n\n\n\n\n\n\nPrevents overheating of Raspberry Pi\n\n\n\n\n\nComes with a power button that can be used to do safe shutdowns and reboots to the Pi.\n\n\n\n\n\nPWM Controllable and Software controllable fan for full functionality and customizability\n\n"
<https://vilros.com/collections/raspberry-pi-fans>