specification:
1. Housing material: aluminum
2. Weight: about 118g
3. Color: black, silver, gray, gold, blue
4. Provide dual fan or fanless type.

Features:
1. Double fans:
(1). Expand the heat dissipation area and bid farewell to overheating.
(2). Low power consumption design, energy saving.
(3). Quiet fan, no noise.
(4). High-quality effective fan
(5). Update the thermal tape to provide the best thermal effect.

specification
(1). Raspberry Pi's precise design, ultra-thin size.
(2). Thick aluminum material is perfect for your Raspberry Pi
(3). Aluminum has very good thermal conductivity. We provide an internal thermal conductive silicone pad to ensure that it has a good passive cooling effect. It also has Silocone heat sinks for CPU and RAM.
(4). Available in 5 colors: black, blue, silver, gray, and gold.
(5). Easy to install

description:
There are four screws for you to fix the case with the Raspberry Pi board.
Adding a large cooling tower can provide better heat dissipation.
Adding the power cooling column can bring better heat dissipation effect for Raspberry Pi4 without worrying about overheating.
No need to install a fan. It also provides perfect heat dissipation.
Durable, tough, durable, rust-free, wear-resistant, and can protect your Raspberry Pi 4 well.
All ports and slots of the case can be perfectly matched with Raspberry Pi 4.

After testing, it will not affect the WIFI signal.