... fan,to achieve a double cooling,It makes the power supply stability and service life to doubled! Also, the ... current, protection against lightning,etc., to ensure the power supply safe. Meanwhile, this power have a best price ,and very cost effective ... over current ,over temperature ,short current.etc.SECURITY CERTIFICATE3C,CE,ROSH .Lead free processMTBF50000 hoursAFTER SALE SERVICESOne year of ...