Argon Raspberry Pi 4 Mini Fan HAT with Built-in Heatsink | ON-Off Switch for The Heatsink Fan | Fully Controllable PWM HAT | 2 Pieces of RPi Fan per Pack
Brand: Argon Forty

The Argon Mini Fan is the latest Raspberry Pi Fan with Heatsink that easily fits into any case. The 30x30mm Fan only uses 12 GPIO pins on the Raspberry Pi, allowing the use of other GPIO pins for other projects. This Rpi Fan is also fully controllable with its switch. You can turn it on, off, or program it to turn on at a certain temperature when set to PWM Mode.

This Argon Raspberry Pi Fan Heatsink keeps Raspberry Pi 4 and Raspberry Pi 3 Model B boards cool thanks to its easy setup while using very few GPIO pins.
The Argon Mini Fan is also PWM Controllable. It can be turned on at any assigned Temperature using Raspbian OS for further customization when necessary.
The switch can turn the Mini Fan on or off, and even set the Mini Fan to PWM mode for full customizability; allowing you to use the HAT however you like.
An RPi Heatsink is also added to ensure contact with the CPU of your Raspberry Pi Board. Use your board to your heart's content without the fear of overheating.
Includes two pieces of Raspberry Pi Fan Heat Sink that fit inside official Raspberry Pi Cases and Argon POLY+ Cases, which can be used for different projects.