FAN HAT for 4B 3B+ 3B PWM Software Control Fan Function Power Button Fit for NEO Case for Pi 4 Features: 1. A fan HAT that uses a 40mm cooling fan to prevent overheating on the for 3 and . 2. Comes with a power button that can be used to do forced shutdowns, safe shutdowns, and reboots to the Pi. 3. Only needs a one-line script for full functionality. Even guves an easy-to-use fan controller allowing users to decide when the HAT should adjust the fan speed. 4. Can change fan speed based on CPU temperature. 5. Provides enough space for a heat sink to be used on the chips of the for board. Material: Plastic colour: As shown Package Contents: 1 x Control Fan Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.