The Shelly Pro 4PM is a professional-grade DIN rail relay designed for advanced automation and energy management in residential, commercial, and industrial environments. Featuring four independent channels with a maximum switching capacity of 40A per channel (single-phase), this device allows users to control and monitor multiple circuits remotely via Wi-Fi or LAN connectivity. The integrated power metering function provides real-time consumption data for each channel, enabling precise energy optimization. Applications include lighting control, HVAC systems, smart appliances, and load management. Key advantages are its robust build quality, enhanced safety features such as overvoltage protection, easy integration into existing electrical panels thanks to the standard DIN rail format, and compatibility with popular smart home platforms like Home Assistant or MQTT. Shelly is renowned for innovative IoT solutions that emphasize reliability and user-friendliness while maintaining competitive pricing. The company actively pursues sustainability by designing products that help reduce overall energy usage through intelligent monitoring?empowering customers to make environmentally conscious choices while enjoying modern convenience.