1. a black metal shell, the shell can protection to the expansion board, and a cooling fan can heat efficiently2. Connected to CM4 motherboard, onboard 40PIN GPIO interface and standard CM4 connector, supporting access to Compute Module 4 Lite/eMMC series motherboards3. Careful hole position design ensures that each interface can fit the motherboard highly, and the interface is marked with clear silk screen for easy viewing4. The magnetic cover plate is designed, and the cover plate adopts the removable magnetic absorption scheme, which realizes the automatic reset function with the positioning column5. Heat dissipation design, the overall metal material of the shell can conduct heat and dissipate heat in a area, and the built-in adjustable speed fan works with the internal heat dissipation fin to dissipate heat more efficientlyCM4 card holder: applicable to all versions of Compute Module 4Ethernet: dual gigabit Ethernet RJ45 interfaceUSB: USB 2.0 interfaceConnector: for Raspberry 40PIN GPIO interfaceStorage: onboard -SD card slot (for versions without eMMC)Fan interface: four wire SH1.0 interface, adjustable speed, measurable speed, 5VPower input: 5V, Type-C interfaceSize: 55 x 68mmPlug Type:US Plug,it applies to Canada, ,Mexico, Thailand, the , the Philippines,Taiwan and so on.Voltage: AC100-240Vcolor:BlackMaterial:PCB+metalPackage Contents:1 x CM4-DUAL-ETH-MINI-BOX1 x 5V 3A Type C power supply (US Plug)1 x Screwdriver1 x Silicone heat dissipation sticker (2PCS)1 x Black anti-skid rubber particles (4PCS)Only the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.