Hello. This pedal has been tested with batteries as well as a wall wart power supply. Works well in both instances. The original peel-off plastic is still on the display. The mark on the "W" in the picture is a scratch on the peel off plastic. COMES WITHOUT A POWER SUPPLY. Thanks for looking. PLEASE NOTE: I recently broke my ankle and had to have surgery. I pride myself on quick delivery but it may be delayed by a day or 2 due to me having to arrange shipping pickup. I have a home shipping account so I'll be able to give tracking not long after purchase. Thanks for your understanding in this matter.
eBay