dc power supply; 1.Apply for :laptop,led,etc 2.Reliable and low- ... 4.small enough to carry around Specification of dc power supply: 1.lnput voltage: AC 100-240V 2.Frenquency: 50/60hz ... /laptop adapter ,ADSL AP, Wireless Lan Station, LCD power supply, Hard Disk power supply, Communication Terminals, Any Portable Device or Machine ,etc ...