This is a High Quality CNC Aluminum Alloy Case for your raspberry pi 3B+/3B. With a big size heatsink and cooling fan can give better heat dissipation. Quiet cooling fan and open case design, help you the fan noisy and wifi sign problem. For Dual Fan: Low Power Consumption Design Dual Cooling Expericnce, More powerful heat dissipation Very Quiet Cooling Fan, the fan noisy All of the Fans were Tested by Our Engineer, Very Nice Quality Control Update Thermal Tape Can Make Sure Best Heat Conduction Effect For Aluminum Alloy Case and Heatsink: Perfect suitable for Raspberry Pi 3 Model B+ /3B Big Size Heatsink and Cooling Fan Can Make Sure: More powerful heat dissipation High Quality CNC Aluminum Alloy Case Can Protect your Pi Safe Open Design Can Make Sure Our CNC Case will not effect Wifi Signal Reinforced aluminum material, lightweight and durable, long-lasting stainless Note: Raspberry Pi is NOT Included Size: 8.5* 5.5*2.2cm Color: Black Material: aluminum alloy Package Contents: 1 * CNC Aluminum Alloy Case with Dual Fan 4 * Screw 3 * Thermal Tape 1 * Screwdriver Only the above package content, other products are not included. Note: Light 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.