Low ProfileActive coolingProvide cooling pads for CPU, RAM IC, Ethernet controller, USBPower Management IC & ControllerPower Supply: from 5V pin of LCD PCBFan: No speed control (Always on)Compatible with:For Raspberry Pi 4 Model B (8GB)For Raspberry Pi 4 Model B (4GB)For Raspberry Pi 4 Model B (2GB)3.5 Inch TFT Touch Screen for Raspberry Pi 4/3B+/3 (Free Touch Pen) - Upgrade VersionColour: as shownMaterial: metal+plasticPackage Contents:1 * for Raspberry Pi 3.5 inch Fan With Holder1 set * Screw1 set * Spacer1 set * Thermal padOnly the above package content, other products are not included.Note: Light shooting 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.