The EMX-AC-1704 is part of the EMAX Industrial Solutions line of products. It is a 4-channel, 12/24V DC Output Relay Module. This module is designed for a wide range of industrial and residential applications, including switching and controlling lights, motors and other electronic devices. The EMX-AC-1704 has a highly reliable, noise tolerant latching mechanism and is capable of switching up to 8A at 30VDC or 15A at 250VAC. It is equipped with overvoltage and short-circuit protection to protect your devices and systems in case of an unexpected electrical short or power surge. Additionally, the EMX-AC-1704 comes with a 2-year warranty and 24/7 technical support, making it a great choice for any commercial or industrial project.