Raspberry Pi 4 Case Fan Works with Raspberry Pi 4 and the Raspberry Pi 4 Case. Designed for over clockers and other power users, it keeps your Raspberry Pi 4 at a comfortable operating temperature even under heavy load. Features Fits perfectly into the lid of the Raspberry Pi 4 Case Temperature-controlled fan delivers up to 1.4CFM of air flow over the processor, memory, and power management IC 18mm × 18mm × 10mm heatsink with self-adhesive pad improves heat transfer from the processor. Specification Input voltage: 5V DC supplied via 40-pin GPIO header on Raspberry Pi 4 Fan speed control: Pulse width modulation control via user-selectable GPIO pin Maximum airflow: 1.4 CFM Case material: Clear PC Documents Raspberry Pi 4 Case Fan - product brief Kit Content Raspberry Pi 4 Official Case Fan & Heatsink