by vrocco » 11 Apr 2008 19:43
I believe that most key machines that are made to run on AC or DC are made that way so the machine can either be used in a shop or in a mobile locksmith van.
The company simply does this so that they don't have to make different models for each purpose.
Also, it allows flexibility. If you get a new code machine for the shop, you can move the shop's old code machine into the van and run it on DC.