The KY-501U is an Unmanaged Ethernet switch with 5×10/100Base-T(X) ports. Engineered with a miniature housing, the unit fits easily into most housings and spaces. Easy and quick installation (plug & play) – youc an install IES-150B easily. Designed to operate in harsh environments and ruggedized to operate in a wide temperature range. DYMEC – “American Industrial”.