dc power supply; 1.Apply for :laptop,led,etc ... 4.small enough to carry around Specification of dc power supply: 1.lnput voltage: AC 100-240V 2.Frenquency ... %) 11.Over-loading protection:115%-150% rated power 12.Short circuit protection and it can automatic ... laptop adapter ,ADSL AP, Wireless Lan Station, LCD power supply, Hard Disk power supply, Communication Terminals, Any Portable Device or Machine , ...