Black Warrior ICE Tower CPU Cooling Fan Seeed Studio Black Warrior ICE Tower CPU Cooling Fan for Raspberry Pi contains a tower structure, a 5mm copper tube, multi-layer heat sinks, and a 7-blade power fan. The Seeed Studio CPU Cooler reduces the temperature of the Raspberry Pi from +80°C to +40°C and prevents overclocking. The Black Warrior Cooling Fan supports the Raspberry Pi 4 Model B.