Waveshare Industrial IoT Wireless Expansion Module for Raspberry Pi CM4(US Plug)About The Protuct This is an industrial expansion module based on Raspberry Pi CM4, which features common interfaces such as Gigabit Ethernet, HDMI, USB, and GPIO, allows additional 4G 5G LoRa wireless communication modules to be connected via the M. 2 or Mini PCIe socket. There are also industrial interfaces resources including RS485, CAN, and RTC. Combined with the industrial rail mount protection case, the module is an ideal choice for building IoT