This was a replacement for a 12V 2A power supply for a fibre optic christmas tree, the original adaptor was getting hot so this was purchased.
Although the light came on the motor would not work. I changed the polarity, still no good. I now use the original adaptor for short periods as this is just not up to the job.
If you have anything with a motor in it this probably will not work although it might be ok for other items.