... small than 5 w 4,Port have:4 port LED power driver< with wire >Input Voltage/ Frequency:AC 180-250 V ... wPort have:4 portOutput Voltage: 1v-20v It very useful: power saving,simple,small,cute,and favourable.you do not need ... transforamer for Led lamp if you use this kind of power supply,and it have 1 meter long wire,4 ports ... our LED lamp.It will be popular used in electric appliance . LED power driver