switching power supply series is one of new type products which donghua electric stock co.,ltd.of zhejiang adopts international advanced design,manufacture technology to develop,widely applied in the automatic control field such as equipment of lei\instrument & meter and so on.this product conforms to the requirement of iec950\ul1012\tuven60950 and emc lvd standard.due to reliable quality,the products are very popular in usa,europe and china,welcome for cooperation.