The IIoT Dual-Switch is a dual-relay control base in the M5 system, designed for the industrial IoT field. Based on the BASE26 design of M5's industrial control products, it adds a dual-relay control module to the original customizable structure. The hardware expandability is compatible with M5Stack's unique module stacking system, making functional expansion easier. The kit offers a variety of communication module options (such as LoRa, GSM, LTE, etc.), enabling the construction of stable and reliable industrial IoT control nodes.