RSD series by EN50155 railway regulations certification, with metal shell protection of high power DC-DC converter, resistance to harsh environment, suitable for use in battery backup system or all kinds of traffic tools. ^^Output 100W 5V 0 ~ 20A. ^^100% original, We can check the serial number on the meanwell website. ^^Reasonable price to ensure quality and service. Buy it now, save time, save life. ^^This item will ship RSD-100B-5*1pcs, enjoy shopping and best wishes!