Specifications PROCESSOR : Broadcom BCM2711 Quad-Core Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz RAM: 4GB EMMC FLASH : 8GB CONNECTIVITY: Dual-band (2.4GHz/5.0GHz) IEEE 802.11b/g/n/ac wireless WiFi, Bluetooth 5.0, BLE with onboard and external antenna options Gigabit Ethernet RJ45 connector 2 x USB 2.0 ports 2 x SATA slots (2.5inch SATA) TF card slot for Compute Module 4 Lite (without eMMC) variants HDMI × 1, supports 4K 30fps output OPERATING VOLTAGE:5V DC CM4104008 is optional. You can choose and purchase other variants of Compute Module 4 according to your needs. Notes Do not unplug any device except the USB when it is charged. The Type C port can be used as a power supply or as a USB SLAVE interface to burn images. In order to ensure the normal power supply of CM4, please do not connect other devices when using the Type C interface to program the image. When CM4 is in normal use, it needs to provide a 5V 2A or higher power supply for CM4. Otherwise, problems such as automatic shutdown and frequency reduction may occur. The module does not have any protection, please do not short-circuit the power supply. USB2.0 is closed by default, if you want to open it, you need to add dtoverlay=dwc2,dr_mode=host in config.txt User Manual waveshare.com/wiki/CM4-NAS-Double-Deck?amazon Support If you require technical support, please go to the Support page in the wiki and open a tickets.