Just bought one of these - great. The only problem is that it works on 12 volts via a 220volt power supply. Not good if you are off grid. I'm wondering, if I buy a suitable lead, can I run it off a 12 volt socket or is the power supply which comes with the player something other than just a power supply? I would ask the manufacturer but internet on the site where I am (Portugal) is not great and it takes ages to get through to the makers site. Has anyone else used an alternative supply - I do have a voltage inverter so could this be used in preference?