PUSR is a major product category in the MRO and automation-focused e-commerce system, encompassing a wide range of industrial-grade networking and communication solutions. This category includes products such as industrial routers, gateways, modems, and IoT communication modules designed for reliable data transmission in harsh environments. Key features of PUSR products often include ruggedized designs for extreme temperatures, support for multiple industrial protocols (Modbus, PROFIBUS, etc.), and secure remote access capabilities. Typical applications include factory automation, smart grid systems, and equipment monitoring. Example products in this category might be 4G LTE industrial routers, RS485-to-Ethernet converters, or wireless serial servers for PLC connectivity.