OKY3504 is a 4-port Industrial Ethernet switch from Okystar Technology Co., Ltd., one of the top industrial network device suppliers in China. It is a high-performance industrial-grade Ethernet switch that provides reliable and secure Ethernet connectivity for industrial automation applications. Its features include a wide temperature range, wide voltage range, extended operating temperature range and voltage range support, an integrated surge protection system, an optional managed switch with up to eight ports and advanced security support, and advanced energy saving functions. It is ideal for use in automated network infrastructure applications such as factory automation, process control, surveillance, building automation and much more.