1、All port and slots in the case are perfectly fit for Raspberry Pi 4 Model B./33, slim design but strong. 2、CNC accurate manufacturing, sandblasting anodizing process. 3、Perfect support for 40-pin GPIO ribbon cable. 4、Status lights are visible, compatible with Bluetooth and WIFI. 5、The passive cooling architecture is designed for perfect cooling and supports CPU and memory coolers. Features: Computer cutting CNC machining aluminum alloy material. All port and slots in the case are perfectly fit for Raspberry Pi 4 Model B./33, slim design but strong. CNC accurate manufacturing, sandblasting anodizing process. Perfect support for 40-pin GPIO ribbon cable. Status lights are visible, compatible with Bluetooth and WIFI.  The passive cooling architecture is designed for perfect cooling and supports CPU and memory coolers.   Specification: Item Type:Case Material:Aluminum Alloy Color:Black/Silver(Optional) Fit for Raspberry Pi 4 Model B Size:92 x 62 x 14mm / 3.62 x 2.44 x 0.55in Package List: 1 x Shell 1 x Accessory Bag