Argon Fan HAT for Raspberry Pi 3B/3B+/4B $9.95 $14.45 Argon Fan HAT for Raspberry Pi 3B/3B+/4B – Active cooling with safe-shutdown button The Argon Fan HAT pairs a 40 mm cooling fan with a built‑in power button for safe shutdown, reboot, and forced-off functionality. It installs in a... Add to Cart