"Mini Base Board for Raspberry Pi Compute Module 4, without RTCThe Mini Base Board offers various connectors for Compute Module 4 boards in Raspberry Pi 4B format.
Technical DataCM4 Socket: suitable for all variants of the Compute Module 4LAN: Gigabit Ethernet RJ45 connectorM.
2 M KEY, supports communication modules or NVME SSDConnectors Raspberry Pi 40PIN GPIO connectorUSB: USB 2.0 Type A × 2, USB 2.0 via FFC connector × 2Display: MIPI DSI display connector (15-pin 1.
0mm FPC connector)Camera: 2x MIPI CSI-2 camera connector (15-pin 1.
0mm FPC connector)Video: 2x HDMI connector (including one connector via FFC connector), supports 4K 30fps outputRTC: not availableMemory: MicroSD card socket for Compute Module 4 Lite (without eMMC) variantsFan header: no fan control, 5 VInput voltage: 5 VDimensions (LxW): 85 × 56 mmScope of deliveryCM4-IO-BASE-ASSD mounting screwExternal linkshttps://www.waveshare.com/wiki/CM4-IO-BASE-A"