Instructions : 1.100% Brand New,Switch power supply, convert AC 110V/220V. 2.Dual input voltage: AC 110V/220V. There is a switch choose the proper voltage before use. 3.Protection: Shortage Protection, Overload Protection, Over-voltage Protection:115%-135%,Action output cut-off Reset:Auto Reset or fuse,Smart device surge protection for Shortage Protection, Overload Protection, Over Voltage Protection. 4.Weight(1500w):4.85 LBS; Size: 9.45 X 4.9 X 3 INCH(L*W*H) /Weight(1000w):3 LBS; Size: 9.6 X 4.9 X 2.6 INCH(L*W*H) 5.One year warrant. 6.Wide input voltage range, steady and precise output voltage.Great power transformer for electronic equipment, Led Lighting, home appliance etc. 7.Wiring: 〨: Ground N: Null wire L: Live wire V+: DC output + V-: DC output -