Aluminum Alloy Case Enclosure Box w/ Dual Fan Heat Sink For Raspberry Pi 4 Model B 4B Features: 1. Ultra-thin design. 2. Easy to install. 3. Fast Heat dissipation. 4. Smooth and straight aluminum material. 5. All ports and slots of the case can match with for Raspberry Pi 4 Computer Model B perfectly. 6. Open case design, you don't need to worry it will effect wifi signal any more. 7. Reinforced aluminum material, lightweight and durable, long-lasting. 8. We use silicon cooling pad (the thickness is only 0.5mm) to touch the shell body to dissipate heat. You can use the CPU grease to replace the silicon colling pad to get better heat dissipation. Dual Fan: Noise: 18dB Low Power Consumption Design. Dual Cooling Expericnce, More powerful heat dissipation. Very Quiet Cooling Fan, get rid of 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. Specifications: Material: Aluminum Alloy Weight: about 117g Compatible with: for Raspberry Pi 4 Model B Package included: 1 x Aluminum Alloy Case Enclosure Box with Dual Fan Heat Sink Note: Only Aluminum Alloy Case, not include main board!