For all I know this is basically a good product, but I can only comment on the one I received. Used the 4.5 plug to power a portable radio, worked initially but on next use was completely dead. It's probably just the fuse, unfortunately the screw heads on the case are neither ordinary slotted nor phillips pattern. Don't know the name but it's like slotted head except with a raised bridge across the slot, or to put it another way like a raised 'H' shape. At any rate I don't have a suitable driver and I'm not sure how many people would have. Shame but fairly inexpensive item so there we are.